Re: The Mind's Eye( was JP Barlow, Ph.D, Social Engineering)

QueeneMUSE@aol.com
Fri, 27 Sep 1996 12:55:21 -0400

Anders writes:
>>
I don't think we can image it well yet, but in PET or FMRI scans it is
visible as an activity increase in the visual cortices. Yes, there are
several high-level cortices dealing with vision, and presumably the
purple walrus will exist as activity in some of them. V1 (the "classic"
visual cortex) deals mostly with what we really see (plus what our brain
extrapolates from it), while V2-V5 seem to deal with various aspects of
it (color, movement, edges etc). I think sensory information gradually
gets integrated with general activity in the association cortices, and
very hard to identify.

> For example if one applies stimuli to the visual parts of the brain would
it
> help someone "see" the purple walrus who had otherwise no ability to
imaging
> visually?

>>If you applied the right stimuli to V1 the person would see the walrus,
but at higher levels the result would probably be more like suddenly
envisioning it. 

--
Anders, ( AND MARK C - THANKS BTW FOR YOUR POST ) first of all, is there any
work being done BEYOND RETINAL DISPLAYS, IN OTHER WORDS NEURAL....( books,
http's, research papers, etc - do you think it is a field already, or is it
just something I think about and sci fi writers go on about)
second, where can I go to look into the specifics of this part of the brain.