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hearing loss; lack or loss of all or a major part of the sense of hearing. For types, see under hearing loss.
Alexander's deafness congenital deafness due to cochlear aplasia involving chiefly the organ of Corti and adjacent ganglion cells of the basal coil of the cochlea; high-frequency hearing loss results.
central deafness that due to causes in the auditory pathways or in the brain; see hearing loss.
conduction deafness (conductive deafness) conductive hearing loss.
functional deafness functional hearing loss.
hysterical deafness functional hearing loss.
pagetoid deafness that occurring in osteitis deformans of the bones of the skull (paget's disease).
1. that due to a defect in the inner ear or the acoustic nerve. See hearing loss.
word deafness auditory aphasia.
sen·so·ri·neu·ral deaf·ness(sen'sōr-ē-nūr'ăl def'nĕs)
Hearing impairment due to disorders of the cochlear division of cranial nerve VII (auditory nerve), the cochlea, or the retrocochlear nerve tracts, as opposed to conductive deafness.
sensorineural deafnessDeafness caused by any defect in the inner ear mechanism that converts sound vibrations into nerve impulses, especially the hair cells of the cochlea, or in the acoustic nerve (8th cranial nerve) or the brain. Compare CONDUCTIVE DEAFNESS.
lack or loss, complete or partial, of the sense of hearing.
sound vibrations are interrupted in the outer or middle ear and do not reach the inner ear and its nerve endings.
infrequent in dogs and cats, not recorded in other species. In most cases is due to cochlear duct degeneration. See also inherited deafness (below).
that due to disease of the cortical centers of the cerebrum.
occurs in some blue-eyed white cats and in some dog breeds; particularly common in the Dalmatian. In some cases it is associated with coat coloration, e.g. white Bull terriers, merle collies and Old English sheepdogs.
due to degeneration of the acoustic sensory organ. Most common in dogs at an early age and associated with incomplete pigmentation of the haircoat and the uvea, in animals with a white or merle coat color. Occurs also in mink, cats and mice.
due to damage of the inner ear nerve endings, the cochlear portion of the eighth cranial nerve, the vestibulocochlear nerve, or the cortical hearing center. See also nerve deafness (above).
overdosing with aminoglycoside antibiotics causes deafness.
conductive hearing loss.