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The following are three case studies with different reasons for cortical deafness. A case published in 2001 describes the patient as 20-year-old man referred for cochlear implants because of bilateral deafness following a motorcycle accident two years earlier. [2] His CT shows hemorrhagic lesions involving both internal capsules. He was ...
Auditory processing disorder (APD), rarely known as King-Kopetzky syndrome, is a neurodevelopmental disorder affecting the way the brain processes sounds. [2] Individuals with APD usually have normal structure and function of the ear, but cannot process the information they hear in the same way as others do, which leads to difficulties in recognizing and interpreting sounds, especially the ...
In case of a severe sensorineural hearing loss caused due to a dead labyrinth, a false negative Rinne test may occur. It is caused by the fact that even though one ear is unable to respond to the test, the other ear can still be stimulated by the bone conduction test (via conducting sound through skull bones to the opposite ear), causing the ...
In one case study, each of the three sound types (music, environmental sounds, speech) was also shown to recover independently (Mendez and Geehan, 1988-case 2 [22]). It is yet unclear whether general auditory agnosia is a combination of milder auditory disorders, or whether the source of this disorder is at an earlier auditory processing stage.
Central auditory processing disorder This is not an actual hearing loss but gives rise to significant difficulties in hearing. One kind of auditory processing disorder is King-Kopetzky syndrome , which is characterized by an inability to process out background noise in noisy environments despite normal performance on traditional hearing tests.
Studies supported by functional imaging and electrophysiology have shown a possible correlation between the auditory cortex and auditory hallucinations. In the case of an average individual, speaking-induced suppression is generated due to speaking to reduce the activity in the primary auditory cortex. [ 25 ]
The findings of these studies indicate that in general, the results of pure-tone audiometry correspond to self-reported hearing problems (i.e. hearing disability). However, for some individuals this is not the case; the results of pure-tone audiometry only, should not be used to ascertain an individual's hearing disability.
Symptoms of this disorder usually begin appearing in adolescence-early adulthood. [3] People with this disorder have may auditory symptoms before and during seizures. For example: [4] [5] Buzzing; Ringing; Humming; Voices; Music; Changes in the intensity/volume of sound; Changes in the senses; Inability to understand speech (receptive aphasia)