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Allen Smith allens at yang.earlham.edu
Mon May 18 06:04:18 EST 1992

In article <1992May10.135016.4207 at cbfsb.cb.att.com>, kja at cbnewsf.cb.att.com (kri
   sta.j.anderson) writes:
> This discussion reminds me of a question I had when I was reading
> about Sperry etc.  One of the books I found claimed that the left
> hemisphere had unmyelinated axons, while the right hemisphere did
> have myelinated sheaths.  The hypothesis was that since myelinated
> sheaths allow for faster processing, parallel processing in the
> right hemisphere, as for pictorial imaging, would be made more
> efficient.
> Then they said that the cells are white or gray depending on
> whether or not there are myelinated sheaths.
> I found the part about the right being myelinated and the left
> being unmyelinated hard to believe.  Could anyone clarify or
> explain the areas of the human brain that are/aren't myelinated?
> Thanks!

        I believe the myelination state, at least in the cerebrum, depends
on whether the area is the interior or the exterior. The outer layer is
the reverse of the inner. However, I can't remember which is which.

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