IUBio

the liver and the brain

dan michaels feedbackdroids at yahoo.com
Fri Sep 3 11:56:31 EST 2004


James Michael Howard <jmhoward at anthropogeny.com> wrote in message news:<2ctdj053ut8c3hvfvalm472pef47dpsf1u at 4ax.com>...
> On 1 Sep 2004 18:58:10 -0700, feedbackdroids at yahoo.com (dan michaels)
> wrote:
> 
> >r norman <rsn_ at _comcast.net> wrote in message news:<p81cj0dpssidqvd146ckens4c5hss9t0tb at 4ax.com>...
> >
> >> 
> >> The evidence is quite clear.  There is good, hard experimental data to
> >> prove that genetically determined motor pattern generating circuits do
> >> exist in mammals in general and humans in particular.  There is also
> >> good, hard experimental data to prove that experience and synaptic
> >> modification is usually necessary to make these circuits function
> >> appropriately to produce useful, responsive, and adaptive behavior in
> >> the functioning organism.
> >> 
> >
> >
> >Thanks for all the references. It'll take a while to get through them.
> >Your summary doesn't help much, however, as it doesn't distinquish
> >between ungulates which run within minutes of being born as compared
> >to humans which take a year or so to make it to pokey walking. Off to
> >the abstracts.
> 
> I suggest the explanation of this is "intraneural" competition.  The
> human brain, being larger, requires more of the mechanism/s for growth
> and development so it competes better than the spinal nerves for
> myelinization.  Therefore, myelinization of the spinal nerves,
> necessary for walking, is defered in humans.


Yes, this is the general mechanism, but I was really conjecturing
about specifics about nature vs nurture in perceptual systems of
ungulates.



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