Damage to Auditory Coex on one side causes:
Unilateral destruction of primary auditory coex does not cause hearing loss or impaired tonal discrimination because the pathways are bilateral. Coical Auditory Areas: Auditory Coex The primary auditory coex of the human brain is located in the superior poion of the temporal lobe in lieschl's gyri'. These gyri are hidden within the syln fissure and are not visible on the convexity of the brain. In the cytoarchitectural map of human brain, primary auditory coex corresponds to 'Broadman's area' 41 and 42 Unlike most other sensory systems, in which information from one side of the body projects solely to the contralateral hemisphere, the auditory system is organized so that there are both ipsilateral and contralateral projections from each ear to the brain. Therefore each auditory coex (temporal lobe) receives auditory input from both ears. Auditory information received at right ear (or left ear) projects to both, the left and the right hemisphere.
Hearing loss and impaired tonal discrimination on the contralateral side
Hearing loss and impaired tonal discrimination on the ipsilateral side
No noticeable hearing loss or loss of tonal discrimination
Impaired localization of sound on the ipsilateral side