Hitting head, seeing stars
Schaap at rullf2.medfac.leidenuniv.nl
Thu Oct 17 04:15:28 EST 1996
In article <firstname.lastname@example.org>,
steven at MSHRI.ON.CA (Robert Steven) wrote:
>I know that the neurons in the eye are capable of responding to a
>stimulus. If you poke your eye in the right place, for example, the
>stimulated and you will see a spot in your visual field. So I guess if
>bang your head you could just be physically stimulating the neurons in
>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
>brain? or retina?) will generate spots before your eyes.
>Sorry no references.
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
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
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