Why does one side of the brain control the opposite side of the body?

[Praaveen]

Dear Friends,

I am looking for a clear and precise answer for my question  Why does one
side of the brain control the opposite side of the body?

Please help me to find an answer this question.

Looking forward with interest to hear from you.

Sincerely,

Praveen.

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[r norman-4]

On Wed, 24 Jun 2009 03:17:47 -0400, "Praaveen" <praaveenk@...>
wrote:

>Dear Friends,
>
>I am looking for a clear and precise answer for my question  Why does one
>side of the brain control the opposite side of the body?
>
>Please help me to find an answer this question.
>
>Looking forward with interest to hear from you.
>

First, you should know that this crossover (decussation is the
technical term) is a peculiarity of vertebrates.  Most animals don't
show it.

Here is a discussion on this subject I participated in five years ago

http://sci.tech-archive.net/pdf/Archive/sci.bio.evolution/2004-12/0204.pdf

That describes my hypothesis that it was just a glitch in the
left-right embryological determination system.  There have been
adaptationist explanations and connectionist explanations but there is
still no really satisfactory and generally accepted view.

Here is a connectionist argument

http://sci.tech-archive.net/pdf/Archive/sci.bio.evolution/2004-12/0204.pdf

Here is an adaptationist explanation
  http://www.ncbi.nlm.nih.gov/pubmed/12523550


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[Sudheendra Rao N R]

Dear Praveen, I hope this link will help. similar question was up in this
same community september 1996.i am sendint the link which displays topics by
thread. The very fact that it was a discussion suggests no conclusion was
approached during that time.
hope it helps you to move further. also kindly note that this topic was
matter of discussion threads twice in that time.
http://www.bio.net/bionet/mm/neur-sci/1996-September/thread.html#25222

On Wed, Jun 24, 2009 at 12:47 PM, Praaveen <praaveenk@...> wrote:

> Dear Friends,
>
> I am looking for a clear and precise answer for my question  Why does one
> side of the brain control the opposite side of the body?
>
> Please help me to find an answer this question.
>
> Looking forward with interest to hear from you.
>
> Sincerely,
>
> Praveen.
>
> _______________________________________________
> Neur-sci mailing list
> Neur-sci@...
> http://www.bio.net/biomail/listinfo/neur-sci
>

--
Think before agree
Think before you nod
STOP thinking
to be a God
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