In article <v01540b00ae8b75cfde51@[192.197.250.46]>,
steven at MSHRI.ON.CA (Robert Steven) wrote:
[snip]
>I know that the neurons in the eye are capable of responding to a
physical
>stimulus. If you poke your eye in the right place, for example, the
neurons are
>stimulated and you will see a spot in your visual field. So I guess if
you
>bang your head you could just be physically stimulating the neurons in
your
>eyes. Or
>maybe the neurons in the visual cortex are physically stimulated by a
hit to the
>head resulting in the perception of spots or stars in the visual field.
>>Could also involve blood flow. Transient restrictions in blood flow (to
the
>brain? or retina?) will generate spots before your eyes.
>>Sorry no references.
>[snip]
>-Rob Steven
>>
Another idea, Oliver Sack researched aurea's during migraine attacks. So
it is possible that with a head bang you temporarilly deprive your
visual cortex of input after which this areas go and generate
chaotic-like patterns.
I have no refs for Sacks; I've only seen some tv-interview (extensive)
on dutch television and I have the dutch text of these interviews. 'Een
schiterend ongeluk' from 'uitgeverij Contact'.
Daniel Dennet has a certain point of view, that is 'vision-demons' just
go on with making 'pictures' and as a result you see stars; it's not
exactly what he is saying, but you may extract this from his story.
Sorry, it's a time ago I've read it. But the title is: 'Consiousness
explained'.
Jeroen
