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Unformatted text preview: good can this be? up to one to two degree change in location. maximum DELAY in E,
minimum in A. the time it can divide up the sound. sound is amazingly precise. the axon is not
uniform, but learns in postnatal development to reach such precision.
spatial summation of potential. Input from
LEFT ear A B C D E Input from
RIGHT ear Sound Localization in Medial Superior Olive
Diagram from a place in cat's brainstem call medial
superior olive. in there have array of place-encoding
neurons. have time lag (different sound in different
place, result in one neuron. break down into increment).
in studies of barn owl, which have good hearing, find
large amount of neurons. they are spatially arranged so
that circuits are maximized. the frequency is logarithmic
array. the auditory system is able to carry out substantial
processing. olive able to find frequency and sound
localization. Log Fr
e quency Location / Frequency
Sensitive Neurons Signal from
LEFT Ear - 0 Time Lag +
RIGHT Ear Yin TCT & Chan JCK (1990) Interaural time sensitivity in medial
superior olive of cat. Journal of Neurophysiology 64:465-488....
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This document was uploaded on 03/09/2014 for the course EXSC 301 at USC.
- Spring '09