Left/Righ and hearing
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.
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
>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
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