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Physiology of hearing and hearing loss

Question
8 out of 39
 

Higher auditory center determine: [AIIMS May 09]



A Sound frequency
B Loudness

C Speech discrimination
D Sound localization

Ans. D Sound localization

10.jpg

This shows that the frequency distribution of fibers in the auditory nerve, is maintained across the cochlear nuclei as a tonotopic map of neurons responding to progressively higher frequency from one side to other.

Dorsal cochlear nucleus is important in determining what sounds are.

II. Superior olivary complex - It receives binaural information and as such forms the first part of the scending auditory pathway where major binaural comparisons are made.

It also helps in sound localization to some extent and neurons that detect differences in sound intensity are ocated in the lateral superior olive (LSO).

III. Inferior colliculus - It helps in understanding 'what a sound is:

It provides a basis for recognizing patterns in sounds. It also has neurons which are involved in sound localization

It is also involved in auditory motor responses. For ex- ample-turning the head or moving the eyes in respond to sound.

IV. Auditory cortex - main function is sound localization?

"Sound localization is markedly disrupted by lesions of the auditory

cortex." -

Physiology of hearing and hearing loss Flashcard List

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