hearing loss due to disease of the auditory pathways (in the central nervous system) which originate in the COCHLEAR NUCLEI of the pons and then ascend bilaterally to the MIDBRAIN, the thalamus, and then the auditory cortex in the temporal lobe. Bilateral lesions of the auditory pathways are usually required to cause central hearing loss. Cortical deafness refers to loss of hearing due to bilateral auditory cortex lesions. Unilateral brain stem lesions involving the cochlear nuclei may result in unilateral hearing loss.


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