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Anatomy 2 MCQ Block 1 1. The two parts of the cranium are: A. Neurocranium B. Viscerocranium C. Chondrocranium D. Cranial base E. Basicranium 5. The pneumatized bones of the cranium are: A. Frontal B. Temporal C. Sphenoid D. Ethmoid E. Palatine 2. The bones forming the neurocranium in adult are: A. Frontal B. Ethmoidal C. Sphenoidal D. Occipital E. Palatine 6. The orbitomeatal plane is a standard craniometric reference with the following landmarks: A. The inferior margin of the orbit B. The superior margin of the orbit C. The inferior margin of the external acoustic meatus D. The superior margin of the external acoustic meatus E. The foramen magnum 3. The neurocranium in adults is formed by the following bones: A. Temporal B. Parietal C. Maxilla D. Vomer E. Zygomatic 7. The features of the facial aspect of the cranium are: A. Frontal bone B. Zygomatic bone C. Orbits D. Maxilla E. Parietal bone 4. The dome-like roof of the neurocranium is called: A. Calvaria B. Skull-cap C. Cranial base D. Chondrocranium E. Basicranium 8. The skeleton of the forehead features: A. The squamous part of the frontal bone B. Metopic suture C. Glabella D. The alveolar processes E. The zygomatico-facial foramen 9. The intersection of the frontal and nasal bones is the: A. Nasion B. Pterion C. Glabella D. Piriform aperture E. Metopic suture 14. The main features of the neurocranial part of the lateral aspect of the cranium are: A. Tempoal fossa B. Externl acoustic opening C. Mastoid process D. Infratemporal fossa E. Zygomatic arch 10. The bony ridge deep to the eyebrows which is more prominent in males, is: A. Supercilliary arch B. Supra-orbital margin C. Nasion D. Pterion E. Glabella 15. The temporal fossa is bounded anteriorly by: A. Frontal bone B. Zygomatic bone C. Superior temporal line D. Inferior temporal line E. Zygomatic arch 11. The curved bony plates on the lateral wall of each nasal cavity are called: A. Nasal conchae B. Nasal spines C. Nasion D. Nasal septum E. Alveolar processes 16. The pterion is usually the junction of the following bones: A. Frontal B. Parietal C. Sphenoid D. Temporal E. Ethmoid 12. The infra-orbital foramen is a feature of which bone? A. Maxilla B. Frontal C. Zygomatic D. Mandible E. Sphenoid 17. The cranial landmark for the anterior division of middle meningeal artery is: A. Pterion B. Lambda C. Nasion D. Inion E. Asterion 13. The main parts of the mandible are: A. Body B. Ramus C. Squamous D. Orbital E. Glabella 18. The point on the calvaria at the junction of lambdoid and sagittal sutures is: A. Lambda B. Bregma C. Pterion D. Inion E. Asterion 19. The asterion is the cranial landmark located at the junction of these sutures: A. Parietomastoid B. Occipitomastoid C. Lambdoid D. Frontoparietal E. Frontomastoid 24. The major structures passing through the foramen magnum are: A. Spinal cord B. Meninges C. Vertebral arteries D. Spinal accessory nerve E. Hypoglossal nerve 20. The posterior aspect of the cranium is composed of: A. Occiput B. Parietal bones C. Mastoids D. Zygomatics E. Styloid processes 25. The mandibular fossa is a feature of: A. Squamous part of the temporal B. Squamous part of the frontal C. Petrous part of the temporal D. Greater wing of the sphenoid E. Mastoid process 21. In the cranium, anteromedial to the mastoid process is: A. The styloid process B. The external acoustic opening (pore) C. The pterion D. The external acoustic meatus E. The zygomatic process of the temporal bone 22. An almost square appearance can be given to the calvaria by: A. Frontal eminences B. Parietal eminences C. External occipital crest D. Coronal suture E. Sagittal suture 23. The hard palate is formed by: A. Maxilla B. Palatine C. Sphenoid D. Ethmoid E. Vomer 26. The anterior cranial fossa is formed by the following bones: A. Frontal B. Ethmoid C. Sphenoid D. Temporal E. Parietal 27. The optic canal contains: A. Optic nerve B. Cranial nerve II C. Ophthalmic vein D. Cranial nerve III E. Ophthalmic artery 28. The foraen ovale contains: A. Maxillary nerve B. Cranial nerve V3 C. Accessory meningeal artery D. Vertebral artery E. Cranial nerve V2 29. The jugular foramen contains: A. Cranial nerve IX B. Cranial nerve X C. Cranial nerve XII D. Cranial nerve XI E. Superior bulb of internal jugular vein 30. The crista galli projects from: A. Ethmoid B. Sphenoid C. Frontal D. Temporal E. Parietal 31. The parts of the sella turcica are: A. Tuberculum sellae B. Hypophysial fossa C. Dorsum sellae D. Crista galli E. Prechiasmatic sulcus 32. The groove for the greater petrosal nerve extends posterior and lateral from: A. Foramen lacerum B. Oval foramen C. Foramen rotundum D. Foramen magnum E. Jugular foramen 33. The pituitary gland is accommodated by: A. Hypophysial fossa B. Sella turcica C. Mandibular fossa D. Temporal fossa E. Pituitary fossa 34. The antero-lateral "walls" of the posterior cranial fossa include: A. Petrous part of the temporal B. Mastoid part of temporal C. Squamous part of temporal D. Clivus E. Dorsum sellae 35. The main buttresses of the cranium are: A. Frontonasal B. Zygomatic arch-lateral orbital margin C. Occipital D. Parietal E. Mastoid 36. The regions of the neurocranial portion of the head are: A. Frontal B. Parietal C. Mastoid D. Zygomatic E. Orbital 37. The viscerocranial portion of the head includes the following regions: A. Facial B. Oral C. Buccal D. Mastoid E. Nasal 38. The scalp is composed of the following layers: A. Skin B. Subcutaneous tissue C. Epicranial aponeurosis D. External periosteum of the viscerocranium E. Pericranium 39. The muscles compressing the cheeks and lips against the teeth and gums are: A. Buccinator B. Orbicularis oris C. Levator labii superioris D. Masseter E. Risorius 44. The area of skin supplied by the maxillary nerve includes: A. Cheek B. Lateral nose C. Dorsum of nose D. Inferior eyelid E. Superior lip 40. The great auricular nerve is a branch of the: A. Cervical plexus B. Ophthalmic nerve C. Maxillary nerve D. Accessory nerve E. Trigeminal ganglion 45. The skin area supplied by the mandibular nerve includes: A. Anterior to auricle B. Posterior two thirds of temporal region C. Tragus D. Roof of external acoustic meatus E. Superior lip 41. The ophthalmic nerve supplies the following skin areas: A. Scalp until vertex B. Anterolateral forehead C. Prominence of cheek D. Dorsum of nose E. Superior lip 46. The skin of the scalp is supplied by the following nerves: A. Supra-orbital B. Lesser occipital C. Greater occipital D. Third occipital E. Auriculo-temporal 42. The ophthalmic nerve trifurcates inside the orbit into the following nerves: A. Frontal B. Nasociliary C. Lacrimal D. Infraorbital E. Zygomatic 47. The motor nerves of the face are: A. Facial B. Mandibular C. Maxillary D. Oculomotor E. Ophthalmic 43. The skin of the forehead and scalp are supplied by: A. Supra-orbital nerve B. Supratrochlear nerve C. Branches of the frontal nerve D. External nasal nerve E. Infratrochlear nerve 48. The motor root of the facial nerve supplies: A. Auricular muscles B. Platysma C. Scalp muscles D. Masticatory muscles E. Skin of forehead 49. The terminal branches of the facial nerve are: A. Temporal B. Zygomatic C. Buccal D. Cervical E. Greater occipital 50. The superficial arteries of the face are: A. Facial B. Lingual C. Superior labial D. Maxillary E. Angular 51. The branches of the facial artery are: A. Superior labial B. Mental C. Inferior labial D. Angular E. Dorsal nasal 52. The arteries supplying the scalp are: A. Occipital B. Posterior auricular C. Supraorbital D. Supratrochlear E. Maxillary 53. The retromandiblar vein is formed by the union of the following veins: A. Superficial temporal B. Maxillary C. External jugular D. Internal jugular E. Facial 54. The veins of the scalp are: A. Supra-orbital B. Supratrochlear C. Occipital D. Superficial temporal E. Maxillary 55. The submandibular lymph nodes drain the lymph from: A. Upper lip B. Lateral parts of lower lip C. Central part of lower lip D. Chin E. Lateral part of face and scalp 56. The location of the epicanthal fold (epicanthus) is a fold of skin is: A. Medial angle of the eye B. Lateral angle of the eye C. Suprapalpebral sulcus D. Infrapalpebral sulcus E. Superciliary arch 57. The cheek contains: A. Buccinator muscle B. Buccal fat pad C. Philtrum D. Epicanthal fold E. Vermillion border 58. The cheek is separated from the lips by: A. Nasolabial sulcus B. Mentolabial sulcus C. Philtrum D. Transitional zone E. Infrapalpebral sulcus 59. The parotid region is bounded by: A. Zygomatic arch B. External ear C. Sternocleidomastoid muscle D. Ramus of mandible E. Temporalis muscle 60. The following elements are embedded within the substance of the parotid gland: A. Facial nerve B. Retromandibular vein C. External carotid artery D. Internal carotid artery E. The parotid duct 61. The parotid duct enters the oral cavity through a small orifice opposite to: A. 2nd maxillary molar tooth B. 2nd mandibular molar tooth C. 3rd maxillary molar tooth D. 1st mandibular premolar tooth E. 1st mandibular molar tooth 62. The parotid sheath is derived from: A. Investing layer of deep cervical fascia B. Pretracheal layer of deep cervical fascia C. Prevertebral layer of deep cervical fascia D. Superficial cervical fascia E. Cervical subcutaneus tissue 63. The parotid bed is wedged between: A. Ramus of mandible B. Mastoid process C. Masseter muscle D. Body of mandible E. Styloid process 64. The parotid sheath is innervated by the following nerves: A. Auriculotemporal B. Great auricular C. Great petrosal D. Lesser petrosal E. Glossopharyngeal 65. The skin of the parotid region is supplied by the following nerves: A. Auriculotemporal B. Great auricular C. Lesser petrosal D. Greater petrosal E. Gloddopharyngeal 66. The parasympathetic fibers to the parotid gland are supplied by: A. Glossopharyngeal nerve B. Facial nerve C. Accessory nerve D. Mandibular nerve E. Maxillary nerve 67. The postsynaptic parasympathetic fibers to the parotid gland originate from: A. Glossopharyngeal nucleus B. Otic ganglion C. Pterygopalatine ganglion D. Gasser ganglion E. Ciliary ganglion 68. The sympathetic nerve fibers supplying the parotid gland originate from: A. Cervical ganglia B. Otic ganglia C. Pterygopalatine ganglia D. Superior ganglia of the vagus nerves E. Trigeminal ganglia 69. The temporal region includes: A. Lateral area of the scalp B. Soft tissues superior to zygomatic arch C. Sof tissues overlying temporal fosa of cranium D. Soft tissues deep to the ramus of mandible E. Soft tissues posterior to the maxilla 70. The temporal fossa is bounded by: A. Temporal lines B. Frontal bone C. Zygomatc bone D. Infratemporal crest E. Ramus of mandible 71. The floor of the temporal fossa is formed by: A. Frontal bone B. Parietal bone C. Greater wing of sphenoid bone D. Temporal bone E. Occipital bone 74. The infratemporal fossa contains: A. Inferior part of temporalis muscle B. Lateral pterygoid muscle C. Otic ganglion D. Maxillary artery E. Masseter muscle 75. The bony articular surfaces involved in the temporomandibular joint are: A. Mandibular fossa of the temporal bone B. Articular tubercle of mandible C. Head of mandible D. Coronoid process of mandible E. Zygomatic arch 76. The internal features of the temporomandibular joint include: A. Articular disc B. Articular labrum C. Two articular cavities D. Two synovial membranes E. The styloid process 72. The temporal fascia attaches to: A. Superior temporal line B. Zygomatic arch C. Mastoid process D. Inferior temporal line E. Ramus of mandible 77. The temporomandibular joint permits the following movements: A. Protrusion B. Retrusion C. Elevation D. Adduction E. Abduction 73. The boundaries of the infratemporal fossa are: A. Ramus of mandible B. Lateral pterygoid plate C. Mastoid process D. Squamous part of temporal E. Greater wing of sphenoid 78. The extrinsic ligaments of the temporomandibular joint are: A. Lateral B. Stylomandibular C. Sphenomandibular D. Pharyngomandibular E. Stylomastoid 79. The muscles involved in the elevation of the mandible are: A. Temporalis B. Masseter C. Medial pterygoid D. Lateral pterygoid E. Suprahyoid 84. The terminal branches of the external carotid artery are the following arteries: A. Maxillary B. Superficial temporal C. Lingual D. Facial E. Superior thyroid 80. The muscles involved in depression of the mandible are: A. Lateral pteryogid B. Suprahyoid C. Infrahyoid D. Masseter E. Platysma 85. The infratemporal fossa contains the following neurovascular structures: A. Maxillary artery B. Mandibular nerve C. Lingual nerve D. Maxillary nerve E. Lingual artery 81. The muscles involved in protrusion of the mandible are: A. Lateral pterygoid B. Masseter C. Medial pterygoid D. Temporalis E. Masseter 86. The infratemporal fossa contains the following neurovascular structures: A. Auriculotemporal nerve B. Inferior alveolar nerve C. Otic ganglion D. Styloid process E. Chorda tympani nerve 82. The muscles involved in retrusion of the mandible are: A. Temporalis B. Masseter C. Medial pterygoid D. Lateral pterygoid E. Suprahyoid 87. The three parts of the maxillary artery are: A. Mandibular B. Pterygoid C. Pterygoid-palatine D. Cervical E. Zygomatic 83. The muscles involved in lateral movements of the mandible are: A. Temporalis B. Medial pterygoid C. Lateral pterygoid D. Masseter E. Suprahyoid 88. Most of the veins that accompany the branches of the maxillary artery drain into: A. Pterygoid venous plexus B. Cavernous sinus C. Internal jugular vein D. Superficial temporal vein E. External jugular vein 89. The branches of the mandibular nerve are the following nerves: A. Auriculotemporal B. Inferior alveolar C. Lingual D. Buccal E. Zygomatic 90. The auriculotemporal nerve includes the folloing groups of nervous fibers: A. Sensory fibers to the auricle B. Sensory fibers to the skin of the temporal region C. Sensory fibers to the temporomandibular joint D. Secretomotor fibers to the parotid gland E. Sensory fibers to the skin of the lower lip 91. The fibers of the inferior alveolar nerve supply the following structures: A. Mandibular teeth B. Skin of the lower lip C. Mucosa of the lower lip D. Skin of the chin E. Skin of the upper lip 92. The lingual nerve is sensory to the following structures: A. Anterior two thirds of the tongue B. Floor of mouth C. Lingual gingivae D. Vestibular gingivae E. Posterior one third of the tongue 93. The chorda tympani nerve carries the following groups of fibers: A. Taste (pecial sensory) fibers from the anterior two thirds of the tongue B. Secretmotor fibers for the sublingual gland C. Secretomotor fibers for the submandibular gland D. Secretomotor fibers for the parotid gland E. General sensory fibers from the anterior two thirds of the tongue 94. The location of the otic ganglion includes: A. Inferior to the foramen ovale B. Medial to the mandibular nerve C. Posterior to the medial pterygoid muscle D. Lateral to the maxillary nerve E. Anterior to the lateral pterygoid muscle 95. Through which nerve do the postsynaptic parasympathetic fibers pass from the otic ganglion to a major salivary gland? A. Auriculotemporal B. Inferior alveolar C. Facial D. Chorda tympani E. Maxillary 96. The temporalis muscle has its proximal attachment on the following structures: A. Floor of temporal fossa B. Temporal fascia C. Maxillary process of zygomatic bone D. Infratemporal surface of greater wing of sphenoid E. Lateral pterygoid plate 97. The masseter muscle has its proximal attachment on the following structures: A. Maxillary process of zygomatic bone B. Zygomatic arch C. Infratemporal surface of greater wing of sphenoid D. Infratemporal crest E. Lateral pterygoid plate 98. The lateral pterygoid muscle has its proximal attachment on the following structures: A. Maxillary process of zygomatic B. Lateral pterygoid plate C. Infratemporal surface of greater wing of sphenoid D. Infratemporal crest of greater wing of sphenoid E. Pyramidal process of palatine bone 99. The medial pteygoid muscle has its proximal attachment on the following structures: A. Lateral pterygoid plate B. Pyramidal process of palatine bone C. Tuberosity of maxilla D. Zygomatic arch E. Angle of mandible 100. The temporalis muscle has its distal attachment on the following structures: A. Coronoid process B. Anterior border of ramus of mandible C. Angle of mandible D. Lateral surface of ramus of mandible E. Medial surface of ramus of mandible 101. The masseter muscle has its distal attachment on the following structures: A. Angle of mandible B. Lateral surface of raus of mandible C. Coronoid process of mandible D. Medial surface of ramus of mandible E. Anterior border of ramus of mandible 102. The lateral pterygoid muscle has its distal attachment on the following structures: A. Temporomandibular joint capsule B. Temporomandibular joint articular disc C. Pterygoid fovea on the neck of condyloid process of mandible D. Lateral surface of ramus of mandible E. Coronoid process of mandible 103. The medial pterygoid muscle has its distal attachment on the following structures: A. Medial surface of ramus of mandible B. "Mirror image" of ipsilateral masseter C. Pterygoid fovea on neck of condyloid process of mandible D. Lateral surface of ramus of mandible E. Tip and medial surface of coronoid process of mandible 104. The branches of the first part of the maxillary artery include the following arteries: A. Deep auricular B. Anterior tympanic C. Middle meningeal D. Accessory meningeal E. Buccal 105. The branches of the second part of the maxillary artery include the following arteries: A. Masseteric B. Deep temporal C. Pterygoid D. Buccal E. Inferior alveolar 106. The branches of the third part of the maxillary artery include the following arteries: A. Infra-orbital B. Artery of pterygoid canal C. Pharyngeal D. Descending palatine E. Inferior alveolar 107. The course of the first part of the maxillary artery includes: A. Posterior to lateral pterygoid muscle B. Medial to neck of condylar process of mandible C. Lateral to stylomandibular ligament D. Deep to the lateral pterygoid muscle E. Medial to temporalis muscle 108. The course of the second part of the maxillary artery includes: A. Adjacent to the lateral pterygoid muscle B. Medial to temporalis muscle C. Posterior to lateral pterygoid muscle D. Medial to neck of condylar process of mandible E. Lateral to stylomandibular ligament 109. The course of the third part of the maxillary artery includes: A. Distal to lateral pterygoid muscle B. Posterior to the lateral pterygoid muscle C. Through pterygomaxillary fissure D. Enters pterygopalatine fossa E. Enters temporal fossa 110. The oral region includes the following: A. Tongue B. Teeth C. Gingivae D. Palatine tonsils E. Pharynx 111. The oral vestibule is the space limited by: A. Teeth B. Gingivae C. Lips D. Cheeks E. Tongue 112. The size of the oral fissure (opening) is controlled by the following muscles: A. Orbicularis oris B. Buccinatot C. Risorius D. Masseter E. Orbicularis oculi 113. The lips extend between the following landmarks: A. Nasolabial sulci B. Nares C. Mentolabial sulcus D. Glabella E. Upper dental arch 114. The oral cavity proper is limited by the following structures: A. Alveolar arches B. Lips C. Teeth D. Palate E. Tongue 119. The external aspect of the cheeks constitutes the following region: A. Buccal B. Zygomatic C. Infraorbital D. Parotid E. Oral 115. The labial frenula connect the following structures: A. Vestibular gingiva B. Mucosa of lips C. Dental arches D. Oral fissure E. Tongue 120. The buccal region is bounded by the following regions: A. Oral B. Mental C. Infra-orbital D. Parotid E. Nasal 116. The upper lip is supplied by the following arteries: A. Facial B. Infra-orbital C. Mental D. Lingual E. Sphenopalatine 121. The buccal glands are located between the following structures: A. Mucous membrane of he cheeks B. Buccinator muscle C. Tongue D. Gingivae E. Orbicularis oris muscle 117. The lower lip is supplied by the following arteries: A. Facial B. Mental C. Infra-orbital D. Lingual E. Sphenopalatine 122. The gingiva proper adjacent to the cheeks is named: A. Maxillary labial gingiva B. Mandibular labial gingiva C. Buccal gingiva D. Superior lingual gingiva E. Inferior lingual gingiva 118. The upper lip is sensory supplied by the following nerves: A. Infra-orbital B. Branches from maxillary nerve C. Mental D. Branches from mandibular nerve E. Facial 123. The surface of the tooth directed outwardly is called: A. Vestibular B. Lingual C. Mesial D. Distal E. Occlusal 124. The surface of the tooth directed inwardly is called: A. Lingual B. Vestibular C. Occlusal D. Mesial E. Distal 129. The periodontium extends between the following structures: A. Cement of the root B. Periosteum of alveolus C. Enamel of the root D. Enamel of the crown E. Dentine of the neck 125. The surface of the tooth directed towards the median plane is called: A. Mesial B. Distal C. Occlusal D. Vestibular E. Lingual 130. The branches of the maxillary artery supplying the teeth are: A. Posterior superior alveolar B. Inferior alveolar C. Infra-orbital D. Descending palatine E. Sphenopalatine 126. The following surfaces of the tooth are contact surfaces: A. Mesial B. Distal C. Occlusal D. Lingual E. Vestibular 131. The fauces are limited by the following structures: A. Soft palate B. Root of tongue C. Palatoglossal arch D. Palatopharyngeal arch E. Epiglottis 127. The main parts of a tooth are: A. Crown B. Neck C. Root D. Gingiva E. Socket 132. The isthmus of the fauces is bounded by the following structures: A. Palatoglossal folds B. Palatopharyngeal folds C. Labial frenula D. Gingivae E. Palatine tonsils 128. A tooth is composed of: A. Dentine B. Enamel C. Cement D. Pulp cavity E. Socket 133. The tonsillar fossa of each palatine tonsil is bounded by the following structures: A. Palatoglossal arch B. Palatopharyngeal arch C. Tongue D. Tonsil E. Uvula 134. The superficial features of the palate include: A. Incisive papilla B. Transverse folds C. Raphe D. Frenula E. Fauces 135. The feature of the hard palate situated medial to the 3rd molar tooth is: A. Greater palatine foramen B. Incisive fossa C. Palatine raphe D. Palatine aponeurosis E. Fauces 136. The arteries supplying the palate are: A. Maxillary B. Facial C. Lingual D. Superficial temporal E. Ophthalmic 137. The muscles of the soft palate are supplied by fibers of the following cranial nerves: A. Vagus B. Maxillary C. Facial D. Mandibular E. Glossopharyngeal 138. The muscles of the soft palate are: A. Tensor velli palatini B. Levator velli palatini C. Palatoglossus D. Styloglossus E. Genioglossus 139. The muscles of the soft palate innervated by branches of the vagus nerve include: A. Tensor veli palatini B. Levator veli palatini C. Palatoglossus D. Palatopharyngeus E. Styloglossus 140. The main parts of the tongue are: A. Root B. Body C. Apex D. Neck E. Head 141. The features of the dorsum of the tongue include: A. Terminal sulcus B. Midline groove C. Lingual papillae D. Lingual tonsil E. Frenulum 142. The extrinsic muscles of the tongue include: A. Genioglossus B. Hyoglossus C. Styloglossus D. Superior longitudinal E. Inferior longitudinal 143. The intrinsic muscles of the tongue include: A. Genioglossus B. Hyoglossus C. Vertical D. Transverse E. Superior longitudinal 144. The superior wall of the orbit includes: A. Orbital part of frontal bone B. Lesser wing of sphenoid C. Fossa for lacrimal gland D. Fossa for lacrimal sac E. Lacrimal groove 149. The inferior orbital fissure separates the following features: A. Orbital surface of maxilla B. Greater wing of sphenoid C. Lesser wing of sphenoid D. Orbital plate of ethmoid E. Frontal process of zygomatic 145. The medial wall of the orbit features: A. Orbital plate of ethmoid bone B. Frontal process of maxilla C. Fossa for the lacrimal sac D. Trochlea E. Fossa for the lacrimal gland 150. The apex of the orbit is at the level of: A. Optic canal B. Superior orbital fissure C. Inferior orbital fissure D. Fossa for lacrimal sac E. Fossa for lacrimal gland 146. The inferior wall of the orbit features: A. Maxilla B. Zygomatic C. Palatine D. Frontal E. Ethmoid 147. The lateral wall of the orbit features the following bones: A. Zygomatic B. Sphenoid C. Temporal D. Ethmoid E. Maxilla 148. The superior orbital fissure separates the following features: A. Greater wing of sphenoid B. Lesser wing of sphenoid C. Orbital surface of maxilla D. Orbital plate of ethmoid E. Frontal process of zygomatic