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- Message-ID: <CSG-L%92121622574350@VMD.CSO.UIUC.EDU>
- Newsgroups: bit.listserv.csg-l
- Date: Wed, 16 Dec 1992 22:54:00 CDT
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: Tom Bourbon <TBOURBON@UTMBEACH.BITNET>
- Subject: Re: neuroscien cont
- Lines: 101
-
- From: Tom Bourbon (921216 22:44 CST)
-
- Mark. Regrettably I lost the first half of your two-part post on
- neuroscience. I believe the second part got to the heart of the
- matter, so here goes.
-
- >Mark William Olson (16 Dec 1992 13:11:31 CST)
- >Subject: neuroscien cont
-
- >I would do memory research just the same. Just because we would
- >describe it differtnly, does not mean that we would investigate
- >it differently.
-
- And later,
-
- >I don't think we should shun present research--we would do it the
- >same and interpreet it diffently.
-
- But that is just my point. PCT does not merely "describe" things
- differently -- it explains something that most neuroscientists,
- especially most memory researchers, do not know exists, or if they
- do they don't try to explain it in their literature. PCT explains
- control. Once you recognize that organisms control some of their
- perceptions, you cannot investigate memory exclusively the way you
- did before. Well, you can, but you will be right back to missing
- the point and you will never learn what "memory" is or how it
- occurs in brains. More on this after your next remarks, that
- follow.
-
-
- >We would investigate differently if we were working at higher
- >levels of analysis (such as social psych research ) but not at
- >levels below. For example, if you wanted to know about
- >neurochemistry sorts of things during a task, you don't care
- >whether percpetions or output is controlled--its just not
- >relevant at that level.
-
- Here, you come to the core of the problem. Before you can search
- for anatomical and physiological correlates, substrates or call
- them what you may, for memory, you must define memory. Most often,
- it is defined in terms of changes in behavior during or after
- certain tasks. Tasks. Living system doing things.
-
- What kinds of tasks will you choose? That is an important
- consideration; the kind of task will determine what you can call
- evidence (a) that memory exists and (b) that you have found it and
- its correlates-substrates-etc. If you think living systems react
- to stimuli, you will use tasks in which they respond to stimuli and
- you probably will define learning as a particular change in which
- responses are associated with which responses, or in how often
- response (or response class) X occurs in the presence of stimulus
- (or stimulus class) Y, and so on. You will employ the revered
- behaviorists' tool kit.
-
- If you think living systems process inputs, cognize on them, select
- appropriate outputs, and either in parallel or serially, plan and
- produce outputs, you will still use many of the items in the
- behaviorists' tool kit, but you might irreverently call them by new
- names.
-
-
- In either case, if you are true to the grand traditions in the
- literature on physiology-anatomy-chemistry-etc of memory, you will
- look for memory in the parts of the nervous system between where
- stimuli-inputs come in and stimulate, and the parts where
- responses-outputs go when they are on the way out. You will
- conceive of memory as a step between in and out and you will assume
- it has a function or form or quality that lets it mediate between
- what comes in and what goes out.
-
- If you realize that living systems control some of their
- perceptions, you will not use tasks that treat them as though they
- are funnels into which causes pour and out of which effects emerge.
- Nor will you think of memory as a process-place-thing that resides
- somewhere between the orifices of the funnel and matches them up in
- "proper" fashion. What you look for, where you look for it, and
- how you decide whether or not you found it all depend on your ideas
- about the bigger picture -- the levels you say do not matter.
-
- You said, "...if you wanted to know about neurochemistry sorts of
- things during a task, you don't care whether percpetions or output
- is controlled--its just not relevant at that level." I would
- describe the situation differently: "If you want to know about
- neurochemistry sorts of things during a task, you had better
- determine, right up front, whether perceptions, or outputs, or both
- of them, are controlled -- that determination is crucial in all
- else that follows in your research at the level of neurochemistry."
-
-
- >Maybe I should ask if PCTers are evn intererestd in mapping brain
- >functions.
-
- Check out my return address!
-
- 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
-