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J. RENN, G. CASTAGNETTI (eds.) Homo Faber Studies on Nature, Technology, and Science at the Time of Pompeii © Copyright 2002 MINISTERO PER I BENI E LE ATTIVITA CULTURALI SOPRINTENDENZA ARCHEOLOGICA DI POMPEI © Copyright 2002 «L'ERMA» di BRETSCHNEIDER Via Cassiodoro, 19 - 00193 Roma Layout: «L'ERMA» di BRETSCHNEIDER All rights reserved. No part of this publication may be reproduced without written permission of the publisher RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH MACIEJ HENNEBERG* and RENATA J. HENNEBERG** In the year 79 A.D. Pompeii was buried under the ashes from erupting Vesuvius. Within hours the medium-sized Roman city vanished from the surface of the Earth.' Several hundreds of people, who were trapped in their houses, In public buildings, and on the streets, died suffocated by volcanic fumes mixed with fine ash. Then the dead were covered by the volcanic ashes along with their material possessions. The city was forgotten for centuries until it was rediscovered in the eighteenth century. The first excavations of the urban area began in 1748.2 During the 250 years of excavation, an enormous wealth of artefacts was recovered from the site. Among commonly used objects of everyday life many medical and surgical instruments have been recovered from houses in Pompeii.3 Some of the instruments ha e not changed their shape and form until today, some others surprise us with their complexity and precision. Along with a variety of objects, human skeletons were uncovered in various locations in the cit . Immediately the question arises: Is there any connection between the medical knowledge of ancient Pompeian and their health status and quality and length of their life? It has been estimated from existing field notes and other documents that skeletons of just over one thou-sand individuals were recovered over the 250 years of excavation.4 Skeletal remain of only a half of the estimated number of individuals have survived up to today and their state of preservation is mostly fragmentary. Despite its fragmentary nature this skeletal material is still one of the largest skeletal samples from the Roman era available for study. More skeletons are slowly yet constantly being excavated in various parts of the city enlarging this sample. The abundance of archaeological evidence from Pompeii and from written sources about the Roman times and the city itself allowed researchers to undertake the reconstruction of many aspects of life in the city.5 While a lot is known about art, architecture, politics, the various activities in the city, trade, technology and war- fare, occupations and interests of its inhabitants, how much do we really know about the people themselves and their biology? The full reconstruction of life cannot be attempted without the hard evidence—the study of the human body. The reconstruction of the biological part of human life from human skeletal and dental remains is one of the goals of biological anthropologists. Human skeletal remains can provide information about demographic structure and demographic dynamics, about physical characteristics of the people and their biological relationships, about the people's relationship to their environment, about diseases they suffered from, diet, hygiene, and about specific activities of individuals. Based on the information embedded in bones it is possible to write the history of the human body and to reconstruct the biological life of the person and the population.6 One of the difficulties of palaeoepidemiology is that many serious or often deadly diseases leave no marks on bones. Any infection that develops rapidly and quickly resolves, either by killing its victim or by being naturally cured, is invisible on bones that are the only remains left to study. Chronic diseases and trauma that involved bone will, however, be seen. Also, the infection or other health impediment that affected a developing child may leave their mark on the enamel of teeth that formed in the jaws of a sick child. These enamel defects are called hypoplasia and manifest on the tooth crown as horizontal rings of thinned enamel or as a series of pits. Thus, the picture we can gain from analyzing pathological conditions in skeletal samples is mostly that of chronic diseases, trauma, and some unspecified infectious diseases and hardships during childhood. This picture is obviously not complete but rich enough to attempt partial reconstruction. The study of ancient populations begins with establishing their demographic structure and dynamics. Studies of paleodemography and of paleopathology have been carried out on many ancient and prehistoric populations. Large skeletal samples suitable to address ques- *Wood Jones Chair of Anthropological and Comparative Anatomy, University of Adelaide, Australia. **DepartmentofAnatomicalSciences,University of Adelaide, Australia. 1 S IGURDSS ON ET AL.. 1 9 8 5 . TIENNE 1 9 9 2 . CASCINO ET AL.,1999. 4 DE CAROLIS ET AL., 1998. 5 TANZER 1939, GRANT 1971, DE FRANCISCIS 1978, DESCOEUDRES 1994, ZAN KER 1998, CIARALLO AND DE CAROLIS 1999. 6 LARSEN 1997. 2 3 1 7 0 MACIEJ H E N N E B E R G A N D RENATA J H E N N E B E R G tions at the population level usually come from cemeteries where people died of natural causes such as terminal illness, and where people were dying over long time, measured usually in centuries. It has been argued that the demographic structure of the population from the "normal" cemetery does not represent the population structure of the living people at a given time such as examined by census takers or studied by epidemiologists. The bias, also called an "osteological paradox," 7 created in the skeletal material from cemeteries makes studies of mortality and studies of prevalence and incidence of diseases more difficult. Paradoxically, the after-math of past catastrophes and epidemics where entire populations have been wiped out in a short time creates better grounds for studying the demography. Such events, however, are rare and accompanying historical documentation is often poor. Pompeii presents the unique opportunity to study the population frozen in time, with truly "living" properties. In addition, the rich archaeological and historical evidence makes the remains of ancient Pompeians an ideal choice for interdisciplinary study and for creating models for studies of less well documented archaeological skeletal samples. In this study we describe the basic biological proper-ties of the Pompeians and, using observations made on bones, we try to answer the following questions: 1) What was the effect of ancient medical practice on the mortality and other demographic characteristics of the population? 2) What was the ability of ancient doctors to cure ailments as compared to the abundance of surgical instruments found in the city? 3) Did the ancient medical knowledge have any influence on the prevalence and incidence of diseases in Pompeii? MATERIAL AND GENERAL METHODS During the years of excavation at Pompeii human skeletal material was transported several times from one storeroom to another. Most of the time bones were stored in locations unprotected against the weather such as the ruins of ancient bathhouses. Lack of proper storage, care-less handling of the bones, and the way the bones were excavated by earlier investigators caused damage to about one half of the skeletal material. At one stage, several decades ago, the skeletons were disarticulated and bones 7 WOOD ET A L . 1 9 9 2 . NICOLUCCI 1882. 9 See the study of the skeletal material from the House of Julius Polybius in HENNEBERG M. ET AL. 1 9 9 6 . 8 were sorted out by the type: skulls and mandibles put separately on a shelf, femora on one pile, humeri on a separate pile, pelves on another, and so on. In another case several skeletons excavated from one sector of the city were mixed together in one big box. Early physical anthropologists considered skulls the only part of the skeleton worth studying. At the end of the nineteenth century Giustiniano Nicolucci separated a hundred of the best preserved skulls from the rest of the individual skeletons for the first classical craniometric study of Pompeians.8 Such treatment of the skeletal material, perhaps justifiable in terms of archaeological methods of the nineteenth and early twentieth centuries, makes it more difficult to establish age and sex of each individual and observe pathological conditions that often involve various bones of the same person. Over the years techniques of excavation have improved and, above all, attitudes towards the importance of skeletal remains as a source of information have changed. Today every piece of bone should be carefully excavated and the bones of an individual skeleton should be kept together, in its biological context, for the maximum recovery of information. A few more recently excavated skeletons have been preserved this way by the Soprintendenza Archeologica of Pompeii and allow control of the accuracy of sexing and aging of the entire material, as well as specific case studies.9 At present the skeletal sample consists of mostly disarticulated and fragmentary remains of around 500 individuals and about 40 almost complete skeletons. Due to its fragmentary nature, various forensic methods used in investigations of mass burials along with classical and recently developed physical anthropological methods have been applied to study the material. Morphological observations at the macroscopic and microscopic level, radiology, and statistical methods are the basic tools used in any investigation carried out by a physical anthropologist. Although these methods are considered classical, further progress has been achieved in their development and application. In addition, a variety of chemical methods have been applied to study bone material at the molecular level including the analysis of ancient DNA. Our studies of Pompeian human skeletal remains are ongoing and attempt to cover as broad a range of subjects of interest to biological anthropologists as possible. Some of the results of our investigations on data collected during the field trips in the years 19932000 are presented below. RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH PALAEODEMOGRAPHY In a normally functioning human population age-specific mortality is measured as numbers of people of a particular age dying from the total number of people of that age alive at the time. Knowing only numbers of deceased is not sufficient because natural increase and other demographic events differentially influence numbers of people alive in various age categories. It is only in the situation of a stationary population, where fertility and mortality rates are stable and natural increase is at zero level, that numbers of deceased in each age category will be directly proportional to numbers of persons alive in those age categories. Hence, reconstructions of mortality profiles from skeletal remains excavated from burial grounds were criticized by demographers as unreliable.10 The only way to test whether ancient populations approximated the stationary model is to compare distributions of deceased by age obtained from "normal" burial grounds with a distribution representing a living population. Due to a natural disaster during which large numbers of people were killed within a matter of hours, Pompeii reflects the living population. This fact allows us to conduct a population census and an epidemiological study of an ancient living population. 171 Fig. 1. Pompeii. Distribution of skulls, mandibles, and hip bones by sex and age. A line representing age distribution in a sample of skeletons excavated at the ancient Greek necropolis of Pantanello (Metaponto) is added for comparison. The rightmost two bars indicate the number of individuals whose age could not be determined more accurately than simply saying that they were adults. MORTALITY The general mortality in a population is studied with the aid of demographic methods. The most common of those is the calculation of life tables.11 These tables contain a number of biometric functions describing probabilities of dying at particular ages, survivorship to a particular age, life expectancy, and structure by age 10 BOCQUET AND MASSET 1977, SATTENSPIEL AND HARPFNDING 1983, BUIKSTRA AND KONIGSBERG 1985, JOHANSSON AND HOROWITZ 1986. 11 ACSÁDIAND NEMESKÉRI 1970, WEISS1973. 172 MACIEJ HENNEBERG AND RENATA J. HENNEBERG F i g 2. Distribution of individuals by age at death atPompeii. Comparison between Pompeii rural Metaponto (necropolis of Pantanello, 6th-3rd century and Paestum (necropolis of Ponte di Ferro, 6th-4th century B. C.). 12 KROGMAN AND ISCAN 1 9 8 6 , LOVEJOY E T A L . 1 9 8 5 . of a living population. When one of these functions is known, others can be calculated based on certain assumptions regarding fertility and thus natural increase. Acsádi and Nemeskéri, in their 1970 seminal and still current monograph, provided substantial num-bers of life tables for prehistoric and early historic populations starting in the Epipaleolithic some 10 thousand years ago and going into the medieval times. The only data, however, at their disposal were derived from skeletal materials excavated from burial grounds. Here, for the first time we apply life table methods to a sample of skeletons representing a living population. Although this approach is free of the "osteological paradox," in the case of Pompeii it encounters another problem. We have already described that most of the skeletons were disarticulated and bones piled up by type, thus creating an additional problem with assessing the sex and age of individuals. To overcome this problem as well as possible, we have chosen elements of the skeleton containing the majority of reliable sexual characteristics that also allow us to observe most common signs of aging. For the study of mortality 364 skulls, 129 mandibles, and 186 right hip bones were available. Many of these skeletal elements were fragmentary. In order to avoid counting the same individuals twice we have considered as representative of a skull any fragment that contained at least the glabellar region (a smooth area between the two brow ridges), of the mandible any large fragment that contained the right ramus and molar region, of the hip bone a fragment containing the auric-ular facet for the articulation with sacrum and the greater sciatic notch just below the auricular surface. Skulls, mandibles, and pelves all display sexually dimorphic characters and allow us to estimate the age at death by observations of the obliteration of cranial sutures, the state of dentition, and the changes on the pubic symphysis and auricular surfaces.12 Accuracy of sexing and aging varies by trait and by the state of preservation. Sex can be reliably established for adults only. The proportions of males, females, and individuals of various ages estimated from each specific skeletal element varied depending on the reliability of diagnostic traits (fig. 1). It can be observed, however, that each skeletal element yielded a number of males and females distributed similarly across age groups. Most individuals in the sample were young adults (20-40 years old), very few were children and a relatively small number were seniles. This distribution seems to be characteristic for most skeletal RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH Table 1. Reconstructed life table for Pompeii 79 A.D. Age (x) d(x) 0 5 10 15 20 30 40 50 60-x 40.00 9.00 5.00 3.00 6.00 7.00 8.00 8.00 14.00 1(x) 100.00 60.00 51.00 46.00 43.00 37.00 30.00 22.00 14.00 4(x) 0.40 0.15 0.10 0.07 0.14 0.19 0.27 0.36 1.00 e(x) 24.6 34.3 34.9 33.4 30.6 24.7 19.3 14.5 10.0 d(x) = percentage dying at age x among all deceased 1(x) = survivorship to the beginning of the age category x q(x) = probability of dying in the age category x e (x) = life expectancy (years remaining to be lived) at the beginning of the age category x c (x) = proportion of persons aged x in total living population (population pyramid), assuming zero natural increase. samples excavated from ancient burial grounds. The small number of skeletons of infants, children, and adolescents is the result of excavation techniques that miss many small bones, and of the lower probability of pres- 173 ervation of small skeletons in collections that were moved several times. Therefore the number of subadults is biased. The age distribution of adults reflects demo-graphic dynamics of a population. In the case of Pompeii it can be argued that skeletons excavated in the city are a result of deaths of those individuals who, for various reasons, stayed behind rather than escaping or even returned to the city during the quieter phase of the eruption. Decisions of these individuals may have been dependent on their sex or age thus resulting in a biased sample of skeletons. Our analysis shows, however, that this has not been the case. The average ratio of adult males to adult females, weighted by the number of bones of each category, is 99/100 though it varies from skulls (148/187) to hip bones (103/83) and to mandibles (63/48) as expected from the different diagnostic values of various skeletal characteristics. The distribution of deceased by age is very similar to that in other skeletal samples (fig. 2). The only difference is the proportion of infants and young children which is mostly an artefact of archaeological techniques. The distribution of adults from Pompeii by age Fig 3. Comparison of survivorship [1(x)] in Pompeii with model life tables, with ancient populations from Ponte di Ferro (servants and slaves from Paestum, Southern Italy, 6th5th century B. C.), rural Metaponto (Greek colonists, Southern Italy, 6th-3rd century B. C.), and nineteenth-century Central Europe. In model life tables level I represents the worst demographic situation with lowest survivorship and level 24 represents the best demographic situation where almost 100% of people survive to 60 years of age. 1 7 4 MACIEJ HENNEBERG AND RENATA J. H ENNEBERG 13 HENNEBERG M. AND HENNEBERG 1998. HENNEBERG M. ET AL 1 9 9 5 . 1i5 HENNEBERG M. 1976, PIONTEK AND HENNEBERG 1981. 16 HENNEBERG M. AND HENNEBERG 1998, HENNEBERG M. ET AL. 1 992 , HENNEBERG M. ET AL. 1 9 9 5 . 17 COALE AND DEMENY 1966. 18 HENNEBERG M. 1976. 19 ACSADI AND NEMESKÉRI 1970. 20 ORTNER AND PUTSCHAR 1985, AU DERHEIDE AND RODRÍGUE -MARTIN 1998. 14 does not differ significantly (KolmogoroffSmirnoff test, p<0.05) from those of two other ancient burial grounds in Southern Italy, Pantanello (6th-3rd cent. B.C.),13 and Paestum (6th-4th cent. B.C.).14 Interestingly, the distribution of adults by age in Pompeii also does not differ significantly from that of adults dying in preindustrial Central Europe (Parish Szczepanowo, Poland, 1828-1854).15 Two important conclusions can be drawn from these comparisons: (1) the skeletal sample excavated in the ruins of Pompeii presents an age structure normal for an ancient population and, (2) age structures of samples killed in a disaster, thus representing a living population, and samples excavated from normal cemeteries of antiquity do not differ. The natural increase in antiquity was therefore small enough not to produce any significant deviation of real populations from the model of a stationary population (stable mortality and fertility, zero growth). Having established that the skeletal sample from Pompeii is similar to other samples from antiquity and pre-industrial Europe, and remembering the under re-presentation of infants and children due to archaeological procedures, a complete life table for the population of Pompeii during the first century A.D. can be approximated (tab. 1). In this approximation we have used previously established life tables for Southern Italian skeletal s m 1 sl6 and the model life tables of Coale and Demeny.17 The life table for Pompeii, being typical for pre-industrial societies, shows low newborn life expectancy of around 25 years, high infant and juvenile mortality, and rather small proportion (14%) of people surviving to old age. These were characteristics of populations who had no means to prevent the spread of infectious diseases and had low levels of general hygiene and sanitation (fig. 3). It seems that the people of Pompeii had no effective means of curing infectious diseases nor of controlling their spread. With the reconstructed life table and knowing that the population of Pompeii was in approximately stationary state it is possible to reconstruct fertility. 8 In a stationary population death rate equals birth rate while the natural increase is zero. Death rate of a stationary population is a reciprocal of the newborn life expectancy's In the case of Pompeii, with newborn life expectancy of 24.6 years, crude death rate was about 4.1% and so was the crude birth rate. Remembering that fertile women constituted approximately 20% of the entire population it can be estimated that the Total Fertility Rate (number of children b o r n per woman surviving to menopause) was 6 to 7 children. Less than half of them were surviving to sexual maturity to participate in reproduction of the next generation. Stresses of frequent childbearing and of common infant and child death must have left their marks on the lives of Pompeian women. PATHOLOGICAL SIGNS ON BONES Only certain diseases, ailments, and traumatic events leave their marks on bones. Typically these are diseases and injuries of bones and those other diseases that, through their chronic nature, produce changes in bones following those occurring in other tissues. The sample of bones from Pompeii, due to its large size, presented signs of many of the most common ailments known to paleopathologists.20 These signs are listed by site and disease in table 2, while their sites are illustrated on figure 4. Traumatic injuries to the skull vault and fractures of long bones were well healed indicating that the patients survived these injuries by a number of years (fig. 5). This testifies to the ability of Pompeian to provide general care of sick people such as cleaning of the wounds, rest, adequate nutrition, and probably basic personal hygiene. Some of the bone fractures were well set while others were not, producing permanent disability. It seems that the knowledge of bone setting of Pompeian surgeons was good, but that this service was not available to everyone. One of the most common pathologies was that of the inflammation of the periosteum (tissue covering bone surfaces) and pericranium (equivalent of periosteum on the skull). These most often manifested as layers of bone tissue (reactive bone) newly formed by the periosteum on the parietal and frontal bones of the skull and on tibiae (shin bones), though they occasionally occurred on other bones. Inflammation of the periosteum (periostitis) is caused by a number of factors. Localized mild trauma to the bone surface may result in localized periostitis. Similarly, periosteal reaction can accompany larger injuries or localized bone diseases, while generalized periostitis is a result of blood-borne systemic infections. In this latter case, the bone surfaces most commonly affected by the periostitis are those covered directly by the skin and, thus exposed to the external RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH Table 2. Diseases and disorders of ancient Pompeian who died in 79 A.D. Pathological sign or disease and part of the body affected No. of cases* or no. of cases/no. of individuals examined Frequency (%) Skull 1. Trauma (fractured skull, wound) 2. Paget's disease 3. Torticollis 4. Premature synostosis of the sutures 5. Hyperostosis frontalis interna 6. Cribra orbitalis 7. Otitis (ear infection) 8. Possible meningitis 9. Arthritis of temporomandibular joint mandible glenoid fossa 10. Stellate lesions 11. Button osteoma 12. Rugosity and pitting on parietals or frontal Combination of signs In p. 10., 11., and 12. 2 3 3 2 36/348 1 1 1 1 1 1 10 (Lazer 1996) 10 <1 <1 38/108 48/201 4 15/300 23/300 5 35 24 1 5 8 5 3 1 1 1 1 2 141/365 7/365 16/149 4/149 2 1 <1 <1 <1 <1 1 39 2 11 3 1 Postcranial skeleton 1. Fractures tibia femur fibula rib finger 2. Osteosarcoma (femur) 3. Periosteal reaction (tibia) 4. Osteoma on long bones 5. Spina bifida occulta (sacrum and L5) completely open posterior part of sacrum 6. Congenital hip displacement 7. Arthritis (various forms) neck: atlas fused with occipital, dens axis spine: diffuse idiopathic skeletal hyperostosis (DISH) zygapophyseal joints (osteoarthritis) vertebral bodies (osteophytosis) elbow: humerus radius ulna hands: phalanges hip: ass. with congenital hip displacement lipping on femoral head sacro-iliac joint (fused) knee: distal femur proximal tibia patella feet: calcaneus metatarsals 2+ 2 1+ common 5+ 1+ 2+ 1+ 2 3+ 1 6+ 4+ 1+ 1+ 2+ * The systematical study of diseases in Pompeii is in progress thus the frequency of pathological signs or disorders is not available for all entries. 175 176 MACIEJ HENNEBERG AND RENATA J. HENNEBERG Fig 4. Summary representation of the pathological findings in Pompeii. Arrows show the parts of the skeleton with pathological conditions found in the human skeletal sample stored in a depository of the Soprintendenza Archeologica di Pompei. 21 STEINBOCK1976,ORTNER ANDPUTSCHAR 1985. 22 HENNEBERG M. AND HENNEBERG 1994, HENNEBERG M. AND HENNEBERG 1998, HENNEBERG M. ET AL. 1992. 23 A. ìarallo, personal communication to the authors. environment with its fluctuating temperatures and possibility of injuries. These are the medial surface of the tibia and, obviously, the forehead and scalp. In Pompeii, the most frequently observed signs of periostitis occur on tibiae (fig. 6a-b) and skull vaults. This therefore suggests that the population was exposed to chronic systemic infections. Among these infections, the most common are usually tuberculosis, leprosy, and treponemal diseases (including syphilis). To distinguish which of these diseases produced periosteal lesions requires observations of their relative distribution on various bones of the skeleton and finding other pathological signs specific for each disease, though not as common as periostitis.21 In Pompeii, we could not yet find any bony signs characteristic for leprosy. Some changes on the vertebral columns could be a result of tuberculosis though not decisively so. On four skulls we were able to observe stellate lesions, characteristic for the healing of gummatous ulcers caused by treponemal disease. These lesions were, however, not extensive. Taking into account that from among the three diseases treponemal infections most commonly leave periosteitis marks on tibiae and skull vaults, and also the fact that these changes on tibiae were more frequently observed in Pompeii than in Metaponto22 where the presence of other specific changes, including dental crown malformations supported the diagnosis of veneral treponematos (syphilis) - we may tentatively conclude that treponemal infections, possibly of veneral, syphilitic nature were also present in Pompeii. This conclusion is strengthened by the fact that Pliny described the use of ointments containing mercury for the treatment of weeping ulcers on the forehead.23 These ulcers are a classical manifestation of tertiary treponematosis. Our investigation is ongoing and future studies may produce more decisive finds and more conclusive diagnoses. The variety of other pathological signs on bones shows that ancient Pompeians were victims of diseases and deformities that still plague modern people. We found two cases of malformed adult femoral heads and necks indicating untreated congenital hip displacement which would cause a permanent limp (fig. 7). Another congenital abnormality resulted in premature fusion (synostosis) of the sutures separating bones of the skull vault during growth. If one of the sutures is fused, the brain growing inside the skull cannot expand all the bones of the vault in a regular fashion. This results i n asymmetrical growth of the braincase (fig. 8). Today the condition is treated by surgically opening the fused suture. One individual was found with the marked asymmetry of the skull indicating another relative common deformity that occurred at birth and is called torticollis. Nerves supplying the muscles of the neck may be torn on one side during birth, which results in partial paralysis and abnormal carriage of the head in a p o s i tion bent towards a shoulder. This in time produces asymmetrical growth of the skull base and face, unless RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH 177 Fig. 5. Skull of an adult with the right parietal bo n e sh o wi n g signs of traumatic injury. The wound, probably inflicted with a sharp weapon, healed successfull long before the person’s death. Note rugosities on the parietal bones that may be a result of pericranial inflammation (Soprintendenza Archeologica di Pompei, Lab. 5). Fig. 6a-b. Striation on the shaft of the tibiae as periosteal reaction to infection (a). Close- p (b). Fig. 7. Femur from a person with congenital hip displacement. Note severe remodelling of the head and neck. 178 MACIEJ HENNEBERG AND RENATA J. HENNEBERG F i g . 8. Skull of a young child. The left coronal suture between the frontal bone and the left parietal bone closed prematurely causing asymmetrical growth of the skull and pressure on the growing brain (Soprintendenza Archeologica di Pompei, Lab. 3). 24 HENNEB RG R.J. AND HENNERERG 1999. 25 AVRAHAMI ET AL.1994. 26 CIARALLO 2000. 27 ORTNER AND PUTSCHAR 1985. 28 BARWICK ET AL. 1997, BARWICK ET AL., 2000 treated surgically in childhood. Mild congenital anatomical variation of the sacrum and adjacent lowest lumbar vertebrae consisting of the incomplete closure of the spinal canal (spina bif d occulta) was quite common among Pompeians, occurring at about 11%. It was, however, less common than in modern populations where it exceeds 20%24 Although it seems to be just a variation in the anatomical structure, it may be related to lower back pain since spinal nerves are less well protected than in a completely closed spinal canal.25 Arthritic diseases of degenerative (age-related) type were common among Pompeians (tab. 2). The rheumatoid (infectious) type of arthritis was also present in the population but was rather rare. Arthritis frequently affected vertebral columns and occasionally other joints (figs. 9-12). These, like today, could cause considerable pain and discomfort which had to be somehow treated without modern pain killers. The concoction of plants and animal parts with a substantial amount of Papaver somniferum, containing opium, was a partial solution for dealing with pain during surgery and as a cure for other painful ailments.26 Pompeian were also affected by other ailments related to aging. We found three cases of Paget's diseases also known as osteitis deformans.27 In some people aged 45 years and older, normal processes of bone renewal and remodelling become irregular. It results in producing abnormal, thick bone tissue which alters the normal shape of a skeleton. The disease is still of unknown origin and produces bone pains and, in later stages, "ape-like" posture and limitation of mobility. First of all the disease affects the structure of bone tissue, thus histological investigation was necessary to differentiate between the diseases producing similar thickened bones and to diagnose the presence of this disorder among Pompeians.28 Neoplastic growth, both benign and malignant, was also found in Pompeian bones. A number of cases of small button-like benign bone tumors called osteoma were found on skulls and long bones. On two femora a profuse lacework growth of delicate bone spicules indicated the presence of well-advanced malignant tumors involving muscle and bone tissue: osteosarcoma. Ancient Pompeians were therefore not free from pain caused by malignant cancer. RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH 179 Fig. 9. Degenerative arthritis (osteoarthritis) of vertebrae. Marginal lipping (bony outgrowth) around the vertebral bodies. Pitted surface of the vertebral bodies. Fig. 10. Large osteophytes and remodelling of all articular surfaces of the cervical vertebrae due to arthritis. Arthritic damage of the vertebral bodies. DENTAL HEALTH Teeth are very durable and thus are usually well pre-served in archaeological skeletal materials. Due to their obvious use for food mastication, their cosmetic significance, and their occasional use in economic activities (holding objects or chewing through leather etc.) teeth are an important source of information about individual habits. Once formed, crowns of the teeth are not remodelled. Thus the structure of the dental tissues retains information about health conditions of individu-als during their childhood when teeth were formed in the gums. Abnormally changed enamel (hypoplasia) may suggest the presence of an infectious disease, or lack of nutrients because of a simple shortage of food, or the presence of a systemic disease. Linear hypoplasia in a 180 MACIEJ HENNEBERG AND RENATA J. HENNEBERG Fig. 11. Fusion (ankylosis) of the sacrum and right hip bone in the sacroiliac joint. Arthritic remodelling of the fourth and fifth sacral segments. Fig. 12. Osteoarthritis in the knee joint. Distal end of the left femur with marginal lipping around condyles (bony outgrowth) and eburnation on the surface of the medial condyle (shiny patch). RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPE FROM THE HARD EVIDENCE OF BONES AND TEETH 181 Fig.13. Part of the mandible of a juvenile with linear enamel hypoplasia on teeth. Two horizontal lines of thinner enamel are visible on the canine and at least one on the premolar. Fig. 14. Part of the maxilla with only one tooth covered by a thick layer of tartar. Note pitting and remodelling of the alveolar bone indicating inflammation of the alveolar process in periodontitis. Larger holes above the lost molar, to the right of the remaining one in the jaw, indicate periapical abscesses (inflammation around roots of teeth often due to severe caries). form of rings of thinner enamel occurred commonly among Pompeian (fig. 13). Many individuals had multiple rings of enamel most probably related to infectious childhood diseases. A few cases of non-linear type were also found in the skeletal sample suggesting the presence of systemic diseases. Pompeians were often affected by dental caries (tables 3, 4). Nearly all individuals had at least one carious tooth while one third of all teeth available for observation were affected by caries. About every tenth tooth was lost during the life of an individual. Although these lost teeth cannot be directly studied, it can be assumed that, as in most recent times, the most common cause of tooth extraction or natural loss was caries. Deep caries penetrating to the pulp cavity often 182 MACIEJ HENNEBERG AND RENATA J. HENNEBERG results in the pulp infection spreading through the canal in the root to the apex of the root. It causes inflammation of the tissues surrounding the root and results in formation of abscesses. An abscess produces a cavity in the bone that often opens by a fistula to the vestibule of the mouth. About one quarter of all individuals in Pompeii had an abscess in the mouth. Periodontal disease, an inflammation of gum tissue and the underlying bone, was also quite frequent and affected about every second individual. In many instances we have observed layers of dental calculus (tartar) which were several millimeters thick (fig. 14). The entire picture of dental pathologies indicates lack of dental hygiene, frequent toothache, and rather prevalent unpleasant mouth odour. It seems that the only form of dental treatment was the occasional removal of a carious tooth. BODY SIZE AS AN INDICATOR OF HEALTH STATUS 29 HENNEBERG M. ET AL. 1989. 30 KROGMAN AND ISCAN 1986, RUFF ET AL. 1997 Child growth and adult body size are the simplest indicators of the general living conditions when compared between populations of similar hereditary determinants of body size. Body height can be reconstructed from the length of skeletal elements, especially the long bones of the limbs. A number of equations allowing pre-diction of body height from bone length ha e been developed. Body weight is reflected in the size of skeletal elements, though the amount of fat deposited in the body during adulthood hardly influences the size of bones. Therefore reconstructions of body weight are only valid for average individuals and represent a body of normal composition. On a population level, there is a strong correspondence between body height and body weight.29 Thus the simplest but still informative method of calculating body weight is the use of its relationship to height. More elaborate methods, taking into account width of skeletal elements as well as body height, are also available.30 The formulae allowing the reconstruction of body height from the length of long bones are sex-specific. Femora and humeri have characteristics allowing the determination of sex. In the first instance only these bones were used to reconstruct the body height of Pompeians. In order to avoid duplicate representation of same individuals only right bones were used. This does not exclude a possibility that the right humerus and the right femur of the same individual were used, but ensures that in estimates from the same bone, femur or humerus, each individual is represented only once. The total material selected for calculations provided a large sample of 272 bones. The maximum length of each femur and humerus was measured to the nearest millimeter on a portable osteometric board. For reconstruction of stature we have used two basic methods: regression equations and proportion of the length of a given bone to the total body length (height, stature). In regression equations the measured length of a bone is multiplied by a constant. Another constant is then added to the result. Constants were obtained by various authors who studied samples of bones from individuals of known stature by means of calculating parameters of linear regressions. This method, although based RECONSTRUCTING MEDICAL KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH on a relatively sophisticated statistical analysis, has a tendency to overestimate stature of very small individuals and underestimate stature of very tall ones. This is due to the fact that correlation between bone length and stature is not perfect and some scatter of individual points around the regression line exists. Estimates of individual statures from regression equations are reasonably good, but in a sample this method tends to restrict the range of variation. The proportion method is very simple. In a sample of skeletons of individuals of known stature, the length of bones is measured and then expressed as a fraction of stature. If, for example, one has determined that the length of a humerus (H) constitutes on average 19% of the stature (S), knowing the actual length of an ancient humerus it is easy to calculate the stature: S=100W19. This method can be criticized for not taking into account the possibility that proportions of limb length to stature can change with total body length. For instance, short individuals often have relatively short legs and long trunks. On the other hand, because it does not rely on imperfect correlations, it does not produce the narrowing of variation ranges in samples. We have used both methods and five sets of specific formulae developed for people of European origin. Exact sources of formulae are given in table 5. In large samples of humans the relation between body height and body weight is reasonably constant. It is described by the equation W=aexp (bH) where W weight in kg, H - height in cm; a oscillates around 2.0 and b around 0.02.31 Thus it is possible to estimate average body weight of a sample of individuals of known height. Such an estimate has a largely illustrative value since, for comparison with other samples and for the assessment of variability, it suffices to study body height. In our study of people buried at the ancient Greek cemetery of Pantanello (Metaponto), we used a=2.05 and b=0.0208.32 These values were derived from statistical analysis of average adult heights and weights of 52 human populations world-wide.33 The same values were reapplied here for Pompeii. The reconstructed statures vary depending on the method and bone used in their calculations (tab. 5). The range for Pompeian males is from 163.1 to 169.4 cm, for females from 151.6 to 155.8 cm. This is mostly a result of various methods based on different samples. For purposes of further discussion, keeping in mind the range of estimates, one can assume male stature to be 183 Table 5. Body height of the inhabitants of ancient Pompeü reconstructed from the length of right femora and humeri by means of various methods. Sample sizes: male femora 66, female femora 100, male humeri 61, female humeri 45. Results in centimeters. Method PEARSON 1899 (regressions) Bone femur Sex Average Standard Deviation M F M F 164.9 152.2 163.1 151.6 4.3 4.3 5.2 3.8 M F M F 166.9 153.0 165.5 153.4 8.5 8.1 9.3 7.2 M F M F 167.3 154.9 168.9 155.8 5.4 5.4 5.6 4.6 DPPERTDIS AND femur HADDEN 1951 (proportions) humerus M F M F 169.4 155.3 168.2 154.8 8.7 8.2 9.5 7.3 TELKKÄ 1950 (regressions) M F M F 167.2 155.0 166.8 152.5 4.8 3.9 5.1 humerus HRDLI KA 1939 femur (proportions) humerus TROTTER AND GLESER 1952, 1977 (regressions) femur humerus femur humerus 3.7 31 around 166 cm and female stature 154 cm. These results are nearly identical to those found by Pardini et al. for Pontecagnano (5th-4th cent. B.C., males 166.3, females 153.9).34 Our range of estimates for Pompeii matches the range found in most populations of classical antiquity including Metaponto.35 The results are even similar to those of modern males from the province of Matera studied by Cappieri,36 but are slightly above statures found for Central Italy in the first to the fift h centuries A.D.37 The statures of male and female Pompeian are significantly shor t er than those recommended by the World Health Organization as a modem reference (fig. 15).38 With the reconstructed stature of Pompeian being average for the ancient inhabitants of Italy, it is not surprising that reconstructed average weight is of the same nature: males 66 kg (61-70 kg), females 50 kg (48-52 kg). It is wort h noting that body weight of 65 kg is taken as a "standard" weight for males in many physiological HENNEBERG M. ET AL. 1989. 32 HENNEBERG M. AND HENNEBERG 1990, HENNEBERG M . ET AL. 1992, HENNEBERG M . AND HENNEBERG 1998. 33 HENNEBERG M. ET AL. 1989. 34 PARDINI ET AL. 1982. 35 HENNEBERG . AND HENNEBERG 1990, HENNEBERG M . AND HENNEBERG 1998, HENNEBERG M . ET AL. 1992. 36 CAPPIERI 1978. 37 RUBINI 1994. 38 For NCHS statistics, see HAMILL ET Al. 1977. 1 8 4 MACIEJ RE NNE B E RG AND RENATA J . RE NNEB E R G F i g . 15. Comparison of statures. and nutritional considerations. It has been accepted by the Food and Agriculture Organization of the United Nations (FAO) as a model body size in temperate climates. Standard deviations of stature reconstructed by means of regression formulae are appreciably smaller than those obtained from simple proportions. This has been expected on grounds of general statistical regularities. It is worth noting that supposedly unbiased standard deviations for stature reconstructed from proportions are similar to or slightly greater than those typically found in various living populations, where they oscillate around 6 to 7 centimeters.39 Further studies may include measurements and descriptions of body casts. The casts preserve large amounts of anatomical detail, including that of the surface of the brain and meningeal blood vessels (fig. 16). CONCLUSIONS 39 HENNEBERG M . AND V A N D E N B E R G 1990. It may be concluded that the skeletal sample excavated from the ruins of Pompeii is representative for the inhabitants of this Roman city. Sex ratio is approximately 1:1, population structure by age similar to that of other ancient and pre-industrial populations. Mortality was high mostly due to infectious diseases while the services of skilled surgeons, though available, as manifested by well-set fractures and well-healed wounds, were accessible only to some individuals. The ability of surgeons to manipulate parts of the human body in a mechanical way was not decisive in reducing mortality. There is an indication of the presence of a chronic systemic infection in Pompeii, possibly a treponematosis, though further studies are needed to confirm this observation. In the skeletal material from Pompeii, ranges of variability of body size and the degree of sexual dimorphism are typical for any human population. The average reconstructed heights and weights indicate that the body size of ancient Pompeian was similar to that of inhabitants of other ancient Greek and Roman cities. It seems that the population of Pompeii has been physically similar to that of many other cities of the Roman Empire. Physical growth of boys and girls in Pompeii took place in conditions typical for Italy from classical antiquity until the first half of the twentieth century. These were far below those observed in modern First World societies and as indicated by statures clearly shorter than the reference recommended by the World Health Organization. Good RECONSTRUCTING MEDICAL.KNOWLEDGE IN ANCIENT POMPEII FROM THE HARD EVIDENCE OF BONES AND TEETH 185 Fig 16. Endocast of an adult brain. Well visible are the two hemispheres with sulci and gyri of the cerebral cortex and branches of meningeal arteries supplying blood to the brain. The endocast of the brain was made accidentally when liquid plaster of Paris was poured into the cavity left by a human body in pyroclastic material. nutrition was available to Pompeians as shown by archaeological and historical sources, thus it seems that disease was the major cause of poor growth of children. In contrast to the beauty of architecture and art that the people of ancient Roman times created, the individual life was short and full of pain. Acknowledgements The authors wish to thank the Soprintendenza Archeologica di Pompei for the invitation to join the team of researchers associated with its Laboratorio di Richerche Applicate. In particular we are grateful to Professor Pietro G. Guzzo, Superintendent of Pompeii, Dr. Annamaria Ciarallo, Director of the Laboratorio, and Professor Baldassare Conticello, former Superintendent of Pompeii, for the per-mission to study the human skeletal remains in their care. During our collaboration with the Soprintendenza Archeologica di Pompei, the financial support of our studies was provided by the Australian Research Council and the Wood Jones Bequest at the University of Adelaide (Australia), the Foundation for Research Development of South Africa, the University of the Witwatersrand, Johannesburg (South Africa). References ACSÁDI AND NEMESKÉRI 1970: Acsádi, György; Nemeskéri, János. History of Human Life Span and Mortality. Budapest: Akademiai Kiadó,1970. 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