left-right reversal of CNS: Why?
kenneth paul collins
KPCollins at postoffice.worldnet.att.net
Mon Sep 9 16:58:06 EST 1996
>I read somewhere that, with the visual fields and somatic pathways
>switched like that, you could think of it as though you had a system
>with ipsilateral representation, and twisted the top of it around 180º
>to face backwards.
...that's bogus... the visual cortex is at the back of the head so
because having it there maintains the global allignment (which also
includes many other exceedingly-powerful, and beautiful, features
that I've not mentioned in this discussion...
>I still have no idea why that's better than ipsi representation, or
>whether it's just an accident in evolutionary history.
...given the competitiveness of Life, the crossed representation is as
if =must= be... ipsilateral architecture simply cannot compete... K. P.
More information about the Neur-sci