IUBio

the liver and the brain

dan michaels feedbackdroids at yahoo.com
Sat Sep 4 20:12:58 EST 2004


lesterDELzick at worldnet.att.net (Lester Zick) wrote in message news:<413a0722.10678522 at netnews.att.net>...
> On 4 Sep 2004 09:35:30 -0700, feedbackdroids at yahoo.com (dan michaels)
> in comp.ai.philosophy wrote:
> 
> >"John Hasenkam" <johnh at faraway.> wrote in message news:<41392480 at dnews.tpgi.com.au>...
> >> "dan michaels" <feedbackdroids at yahoo.com> wrote in message
> >> news:8d8494cf.0409030853.7911b8bf at posting.google.com...
> >> > > >In contrast, since ungulates pop out into the world being able to walk
> >> > > >and run within hours, I was also wondering that their visual systems
> >> > > >might also be similarly advanced, as compard to humans and other
> >> > > >animals like you mentioned. Do they have to "learn" what a lion looks,
> >> > > >or might their visual systems already have some hard-coding regards
> >> > > >this?
> >> 
> >> To come at this from a tangent, it is interesting to recall studies showing
> >> how axons for varous senses, after injury, can end up projecting to regions
> >> other than their "programmed" targets. Auditory axons will project to visual
> >> areas, perhaps explaining the echo location noted in some blind individuals.
> >> Not many studies on this but the few are surprising in their results.
> >> Results such as these suggest a top down guidance of axonal projections, but
> >> I'll freely admit I find that very spooky.
> >> 
> >> John.
> >
> >
> >You might be referring to studies in amphibians and ferrets, but this
> >doesn't address my question regards the level of development of
> >perceptual systems at the time of birth in precocial ungulates either,
> >does it.
> >
> >It's a fairly interesting problem in its own right, since a baby zebra
> >has to be ready to flee from a lion shortly after birth, if it ever
> >wants to get to be an adult zebra. To flee from a lion, it might help
> >to be able to distinquish one from a parent zebra, so upon seeing its
> >own parent, it doesn't go running off into the jaws of the nearest
> >lion. I guess it's conceivable the adult zebra would be able to
> >"teach" its baby what a lion is in the first hour or so, or that the
> >baby learns on its own the first time a lion comes to eat it. Operant
> >conditioning rules, so long as the organism makes it through the first
> >day against something 10X its size and power, not to mention the big
> >teeth.
> 
> The baby zebra wouldn't have to learn to discriminate lions. It would
> just have to learn to stay with its mother, a much easier task for
> which it is presumably born pretty much ready.
> 
> Regards - Lester


So, it comes out and immediately "imprints" on its own mother, like a
duck on the first thing it sees? And then over time, it finally does
learn about the lion? Motor activity is precocial, but general
perception is altricial? - to use RN's terms.



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