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- Original_To: BITNET%"csg-l@uiucvmd.bitnet"
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- Message-ID: <CSG-L%92121514172614@VMD.CSO.UIUC.EDU>
- Newsgroups: bit.listserv.csg-l
- Date: Tue, 15 Dec 1992 14:13:00 CDT
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: Tom Bourbon <TBOURBON@UTMBEACH.BITNET>
- Subject: Re: neuroscience
- Lines: 92
-
- From: Tom Bourbon (921215.0925 CST)
-
- Re: Mark William Olson (14 Dec 1992 10:35:50 CST)
-
- You were having trouble with your text editor and only part of your
- message arrived, but I think at least part of your point came
- through.
-
- >(cont).
- >then you've got something related to memory, no matter how you
- >describe it. Hubel and Wiesel (sp?) found some pretty interesting
- >(although incomplete) stufff about the organization of the
- >occipital cortex and probably never even heard of PCT. Do you
- >want to claim that they are wronb because they have the wrong
- >paradigm?
-
-
- No. I never did and I never will. I started teaching long enough
- ago that, for the first several years, whenever I discussed the
- work of Hubel and Wiesel I included a totally safe prediction that
- they would share a Nobel Prize. They did, and they deserved it.
- But I also predict that when someone finally picks up the challenge
- and the opportunity to study nervous systems as though organisms
- control some of their perceptions, that person will learn things
- Hubel and Wiesel did not, and could not, learn. And I believe it
- is totally safe to predict that the person, or someone else soon
- after, will win a Nobel Prize. If I had the skills and techniques
- to work at the single-cell level with Aplysia, the marine snail, I
- would drop everything else and begin a crash program, starting with
- behavioral studies to test whether the creature controls anything.
- After demonstrating the obvious, I would begin a systematic
- analysis of the control-system properties of the creature's
- exquisitely mapped nervous system -- anatomically exquisite, I do
- not trust most of the functional maps. They were created in S-R,
- or I-O, research procedures. If anyone out there is interested in
- a trip to Oslo, I believe I just handed you a ticket.
-
-
- >We know alot of visual processing occurs in occipital. We know
- >that attention mechanisms are involved in at least prefrontal
- >areas. We know that the hippocampus is involved in at least one
- >form of memory. WE didn't need PCT to find that out, because we
- >are working at a levelof analysis below PCT.
-
- Yes, we do; and no, "WE" didn't. But the meaning of what we know
- is not very clear. Many of the biggest problems in our
- understanding of how brain and behavior-psychology are related come
- from the vagueness or the inadequacy of our ideas about the
- behavioral and psychological phenomena we try to explain. What
- does it mean to say that a particular "area" or "region" of the
- brain is "involved" in a particular function or process, whose
- definition or existence is not established? Which of the many
- conceptualizations of attention can we explain in terms of
- involvement in the prefrontal areas? Are there "forms" of
- something called "memory" and how is the hippocampus involved in
- one of them? Please realize I am NOT saying that people do not
- find correlations between, on the one hand, damage to or
- stimulation of different parts of the brain, and on the other hand,
- the behavior of organisms. But the correlations are often poor,
- and so is the localization of any perturbation applied to the
- brain. And our conventional understanding and portrayal of
- behavior is often poor.
-
- To explain what we think we know about behavior, we use what we
- think we know about brains; to explain what we think we know about
- brains, we use what we think we know about behavior. Most of what
- we think we know about either topic comes from research in which
- brains, neurons, whole organisms, small groups, societies,
- behavioral actions, and consequences of actions are all conceived
- of in classic S - R terms, or in more modern, but identical, I - O
- terms. All of that accumulated knowledge must be re-examined in
- light of the fact that organisms control many of their perceptions.
-
-
- >Sure PCT could help inform the process but it isn't as necessary
- >as it would be for levels above PCT--the rest of psychology.
-
- PCT is not about a few "higher" levels of perception. It is about
- control by living systems. Living systems control the perceived
- states of so many variables that control, achieved through negative
- feedback interactions with the environment, is probably a defining
- property of life. If that is so, no part of the life sciences is
- immune from the need for a theory that explains control. PCT
- explains control.
-
- Until later,
-
- Tom Bourbon e-mail:
- Magnetoencephalography Laboratory TBOURBON@UTMBEACH.BITNET
- Division of Neurosurgery, E-17 TBOURBON@BEACH.UTMB.EDU
- University of Texas Medical Branch PHONE (409) 763-6325
- Galveston, TX 77550 FAX (409) 762-9961 USA
-