Lecture IV pathology - Neurobiology of Hearing
... • Hair cell loss is greatest amongst the outer hair cells which appear more vulnerable than inner hair cells • It also begins with high frequency (basal) hair cells and progresses apically with time • Ganglion cell loss can occur independently ...
... • Hair cell loss is greatest amongst the outer hair cells which appear more vulnerable than inner hair cells • It also begins with high frequency (basal) hair cells and progresses apically with time • Ganglion cell loss can occur independently ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... years of age1. After the age of 60 years, hearing is said to be declining by about 1 dB per year and this was said to be worse in males than females2. In Nigeria, Aremu et al3 found in their study that 21% of the elderly patients suffer from hearing loss and this may be unnoticed in most of these pa ...
... years of age1. After the age of 60 years, hearing is said to be declining by about 1 dB per year and this was said to be worse in males than females2. In Nigeria, Aremu et al3 found in their study that 21% of the elderly patients suffer from hearing loss and this may be unnoticed in most of these pa ...
Otoacoustic Emission Testing for Pediatric
... Auditory brainstem response (ABR) —measures the brain's activity in response to the sounds. ABR plays an important role in both identification and assessment, particularly with children too young or too developmentally delayed for reliable assessment using conditioned behavioral techniques. Otoacous ...
... Auditory brainstem response (ABR) —measures the brain's activity in response to the sounds. ABR plays an important role in both identification and assessment, particularly with children too young or too developmentally delayed for reliable assessment using conditioned behavioral techniques. Otoacous ...
teaching deaf and hard of hearing students
... SENSORI-NEURAL LOSS Occurs when there is a problem in the inner ear or with the neural pathway that carries sound to the brain. This type of loss is permanent and more severe than other types of loss. CAUSES: diseases during pregnancy heredity childhood diseases (mumps, measles, chicken pox) vir ...
... SENSORI-NEURAL LOSS Occurs when there is a problem in the inner ear or with the neural pathway that carries sound to the brain. This type of loss is permanent and more severe than other types of loss. CAUSES: diseases during pregnancy heredity childhood diseases (mumps, measles, chicken pox) vir ...
Presentation Name
... Administration of steroids to middle ear round window niche/membrane directly targeting the inner ear Very little systemic absorption – May benefit patients for whom systemic steroids are contraindicated Higher concentration to end organ May salvage hearing loss when nonresponsive to systemic steroi ...
... Administration of steroids to middle ear round window niche/membrane directly targeting the inner ear Very little systemic absorption – May benefit patients for whom systemic steroids are contraindicated Higher concentration to end organ May salvage hearing loss when nonresponsive to systemic steroi ...
Lesson 1.3 The Aftermath: Hearing Loss
... Using the assigned patient case study you will: • Explore how damage to the outer, middle, and/or inner ear results in hearing loss • Learn how to interpret audiograms and match up their patient case study with the corresponding audiogram • Use what you have learned to make a recommendation as to wh ...
... Using the assigned patient case study you will: • Explore how damage to the outer, middle, and/or inner ear results in hearing loss • Learn how to interpret audiograms and match up their patient case study with the corresponding audiogram • Use what you have learned to make a recommendation as to wh ...
ANATOMY AND PHYSIOLOGY OF THE EAR
... Permit test signal to be heard at threshold levels Reduce sound by producing an acoustical barrier to sound transmission Reduce high frequencies more than low ...
... Permit test signal to be heard at threshold levels Reduce sound by producing an acoustical barrier to sound transmission Reduce high frequencies more than low ...
Anatomy and Physiology of the Ear
... impulses from cilia (in cochlea and semicircular canals) to the brain for interpretation ...
... impulses from cilia (in cochlea and semicircular canals) to the brain for interpretation ...
ADA Umbrella Education Recognition Project
... C. Salicylates (aspirin, darvon, darvocet) D. Cancer Chemotherapy Hormone Replacement treatment E. Quinine ...
... C. Salicylates (aspirin, darvon, darvocet) D. Cancer Chemotherapy Hormone Replacement treatment E. Quinine ...
Immune mediated sensorineural hearing loss in a myositis patient
... Immune mediated inner ear disease (IMIED) is a syndrome that is characterized by subacute onset of sensorineural hearing loss, often accompanied by vestibular symptoms. It may develop as a primary disorder, without any organ involvement, or complicates systemic diseases like vasculitides (Wegeners ...
... Immune mediated inner ear disease (IMIED) is a syndrome that is characterized by subacute onset of sensorineural hearing loss, often accompanied by vestibular symptoms. It may develop as a primary disorder, without any organ involvement, or complicates systemic diseases like vasculitides (Wegeners ...
Hearing Loss & Genetics
... PRES, TMPRSS3, TMIE, GJB2 Deafness GeneChip (Greinwald Study): MYO7A, OTOF, CHDH23, KCNE1, KCNQ1, PDS, GJB6, GJB2 ...
... PRES, TMPRSS3, TMIE, GJB2 Deafness GeneChip (Greinwald Study): MYO7A, OTOF, CHDH23, KCNE1, KCNQ1, PDS, GJB6, GJB2 ...
Personalized Medicine of Deafness
... – p.L281S in KCNQ4 (DFNA2) – Found 4 variants in one dominant case, none segregating with deafness- etiology unknown ...
... – p.L281S in KCNQ4 (DFNA2) – Found 4 variants in one dominant case, none segregating with deafness- etiology unknown ...
Multistate Study of Etiology in Newborn Hearing Screening
... To determine the etiology of congenital hearing loss based on children identified through a statewide newborn hearing screening (EHDI) program – To evaluate all children with permanent hearing loss, unilateral or bilateral, of any degree, from a genetic perspective – To determine the frequency of GJ ...
... To determine the etiology of congenital hearing loss based on children identified through a statewide newborn hearing screening (EHDI) program – To evaluate all children with permanent hearing loss, unilateral or bilateral, of any degree, from a genetic perspective – To determine the frequency of GJ ...
Sensorineural hearing loss
Sensorineural hearing loss (SNHL) is a type of hearing loss, or deafness, in which the root cause lies in the inner ear (cochlear), vestibulocochlear nerve (cranial nerve VIII), or central processing centers of the brain. Sensorineural hearing loss can be mild, moderate, severe, profound, or total.The great majority of human sensorineural hearing loss is caused by abnormal structure or function of the hair cells of the organ of Corti in the cochlea. There are also very unusual sensorineural hearing impairments that involve the eighth cranial nerve (the vestibulocochlear nerve) or the auditory portions of the brain. In the rarest of these sorts of hearing loss, only the auditory centers of the brain are affected. In this situation, cortical deafness, sounds may be heard at normal thresholds, but the quality of the sound perceived is so poor that speech cannot be understood.Sensory hearing loss is due to poor hair cell function. The hair cells may be abnormal at birth, or damaged during the lifetime of an individual. There are both external causes of damage, like noise trauma and infection, and intrinsic abnormalities, like deafness genes.Neural hearing loss occurs because of damage to the cochlear nerve (CVIII). This damage may affect the initiation of the nerve impulse in the cochlear nerve or the transmission of the nerve impulse along the nerve. Hearing loss that results from abnormalities of the central auditory system in the brain is called central hearing impairment. Since the auditory pathways cross back and forth on both sides of the brain, deafness from a central cause is unusual.Sensory hearing loss can also be caused by prolonged exposure to very loud noise, for example, being in a loud workplace without wearing protection, or having headphones set to high volumes for a long period. Exposure to a very loud noise such as a bomb blast can cause noise-induced hearing loss.