Left/Righ and hearing

Kalman Rubinson kr4 at nyu.edu
Tue May 10 10:00:46 EST 2005


Just to add:  There's an obligatory synapse in the inferior colliculus
between the brainstem nuclei and the medial geniculate.

Kal

On Tue, 10 May 2005 12:51:21 +0200, SJM Guzman
<jose.guzman at medizin.uni-leipzig.de> wrote:

>Dirk Bruere at Neopax wrote:
>> Left and right visual data are procecessed by opposite hemispheres.
>> Is the same true of hearing, or is it left-left and right-right?
>> 
>
>For hearing the process is basically the same. Sensory information 
>(hearing, seeing, smelling...) is processed by specific neural cells, 
>called sensory receptors. These neurons connect to the thalamus, and 
>from that, to the respective sensory areas of the cortex.
>
>The only thing that you have to know is that in both, hearing and 
>seeing, some sensory information coming from the left side goes to the 
>same hemisphere (ipsilateral), and some goes to the opposite hemisphere 
>(contralateral).
>
>For hearing the cells responsible for collecting the auditory 
>information are the hair cells (or auditory receptor cells). They send 
>the information through the auditory nerve to the brain stem, where they 
>activate other neurons, which send the information to the both thalamus 
>(medial geniculate nuclei). That means, it activates the same thalamic 
>nuclei (ipsilateral), and the opposite thalamic nuclei (contralateral). 
> From thalamus the information converges into the respective cerebral 
>auditory cortex.
>
>Have a look to the this link
>
>http://hyperphysics.phy-astr.gsu.edu/hbase/sound/anerv.html
>
>
>Regards!
>
>SJM Guzman
>Visit my neurosite at
>http://www.neurohost.org




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