Central hearing loss
Central hearing loss Classification and external resources MeSH D006313
Central hearing loss is a form of sensorineural hearing loss caused by damage to the auditory pathways. When the damage is to the primary auditory cortex, the impairment is called "cortical deafness".
Cortical deafness is essentially the combination of word deafness and auditory agnosia. It is characterized by an inability to interpret either verbal or nonverbal sounds with preserved awareness of the occurrence of sound (as for instance by a startle reaction to a clap. In most instances, the cause is bilateral embolic stroke to the area of Heschl's gyri. It usually results from bilateral lesions and happens when remaining normal auditory cortex is destroyed. It begins as a sudden deafness, which evolves into a picture where patients can hear sounds but are unable to recognize their meaning. Relatively few cases of this disorder have been studied. Note that this syndrome might be difficult to distinguish from a brainstem lesion such as described above. Mendez and Geehan have reviewed this syndrome (1988). The black areas on the scan above are strokes in the temporal lobes of both sides.
- Overview at dizziness-and-balance-com
- Hood L, Berlin C, Allen P (1994). "Cortical deafness: a longitudinal study.". J Am Acad Audiol 5 (5): 330–42. PMID 7987023.
Diseases of the ear and mastoid process (H60–H99, 380–389) Outer ear Middle ear and mastoid Inner ear and
central pathwaysCommon pathwayExcessive responseOtherAcquired auditory processing disorder · Spatial hearing loss
Wikimedia Foundation. 2010.
Look at other dictionaries:
central hearing loss — hearing loss due to causes in the auditory pathways or in the auditory cortex of the brain … Medical dictionary
Sensorineural hearing loss — Classification and external resources Cross section of the cochlea. ICD 10 H … Wikipedia
Conductive hearing loss — Classification and external resources Anatomy of the human ear. ICD 10 H … Wikipedia
sensorineural hearing loss — hearing loss due to a lesion in either the cochlea (sensory mechanism of the ear), the vestibulocochlear nerve, the central neural pathways, or a combination of these structures. It is sometimes subdivided into cochlear h. l. and retrocochlear h … Medical dictionary
Unilateral hearing loss — DiseaseDisorder infobox Name = PAGENAME ICD10 = ICD10|H|90|1|h|90, ICD10|H|90|4|h|90, ICD10|H|90|7|h|90 ICD9 = ICDO = Caption = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = DiseasesDB = Unilateral hearing loss (UHL) or single sided… … Wikipedia
neural hearing loss — sensorineural hearing loss caused primarily by a lesion of the vestibulocochlear nerve or the central neural pathways … Medical dictionary
Noise-induced hearing loss — (NIHL) is an increasingly prevalent disorder that results from exposure to high intensity sound, especially over a long period of time. Contents 1 Description 2 Mechanism 3 Types 3.1 … Wikipedia
Hearing impairment — See also: Deaf culture for the social movement.. Deaf and/or hard of hearing Classification and external resources The International Symbol for Deafness … Wikipedia
central deafness — n hearing loss or impairment resulting from defects in the central nervous system (as in the auditory area) rather than in the ear itself or the auditory nerve compare CONDUCTION DEAFNESS, NERVE DEAFNESS … Medical dictionary
Hearing aid — Behind the ear aid In the ear aid … Wikipedia