[From Bob Clark (930313.1700 EST)]
GARY CZIKO (930307.0450 GMT)
A few weeks ago I looked at my Britannica (about 30 years old) for items
that might relate neural sytems to PCT. I looked up various animal systems
as well as Nervous Systems and Comparative Anatomy therof. Several were
very interesting -- in non-PCT terms, of course. The descriptions seem
quite complete and detailed. Several of the simpler forms seem to do quite
well without any kind of control system. It seems that some form of
Central Nervous System is probably essential for any PCS beyond a single
level system with a fixed reference level. And no control system at all
may be adequate for the simplest animals to "respond" to environmental
disturbances such as changes in pH and variations in concentration of
chemicals.
I would think that the U of I would have suitable experts who could
summarize this information -- and might thereby become interested in PCT!
Regards,
Bob Clark
ยทยทยท
SUBJECT: BRAIN EVOLUTION - RKC