Re: the nervous system
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Re: the nervous system         

Group: alt.philosophy · Group Profile
Author: Wolf Kirchmeir
Date: Jul 16, 2008 09:02

r norman wrote:
> On Wed, 16 Jul 2008 16:37:56 +0200, Jure Sah gmail.com>
> wrote:
>
>> r norman pravi:
>>> The spinal cord is, indeed, part of the central nervous system. And
>>> any nervous activity that is influenced by or influences the real
>>> world must connect to the world through sensors and effectors, hence
>>> the peripheral nervous system and accessory organs are part of the
>>> total system.
>>>
>>> The role of learning in behavior largely mediated by reflexes is a
>>> complex question, as is the development of behavior mediated both by
>>> inborn (instinctive or genetically determined) patterns of
>>> connectivity and activity and by the environment. Still, humans like
>>> all other animals seem to contain a great deal of central nervous
>>> system organization genetically determined to produce posture and
>>> locomotion. Exactly when that system gets put into full use at the
>>> start of life is a separate question -- the system can be genetic but
>>> incompletely developed at birth; it can depend on environmental cues
>>> to establish the connectivity and activity patterns; it can depend on
>>> learning; it can depend on some combination of these.
>> Isn't the role / function of the Cerebellum known a little better than
>> that?
>>
>> The part of the human brain is obviously learning but not really
>> connected (I mean in terms, not physically) to a conscious mind. I
>> wonder if this makes this type of learning relevant to this topic.
>>
>
> Human (and mammalian) locomotion is a complex interaction between the
> spinal cord, the cerebellum, a complex of motor centers in the brain
> stem, and the cerebral cortex.

There appear to be reflex loops that bypass the spinal cord. Source: a
Ph.D. student who had received a fellowship to Stockholm to study
precisely this.
> Most of it is "unconscious" although
> certainly subject to conscious control and activation. The real
> problem is unraveling just how much is genetically programmed and how
> much involves environmental effects.

IMO that's the worng question. The correct question is "How do
environment and genome interact to produce the phenotype and behaviour
that we observe?" The answer, in general, seems to be "In such a complex
way that it will never be completely known."

[snip allusions to evidence of this complexity]

HTH

--
wolf k.
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