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k p Collins kpaulc at [----------]earthlink.net
Wed Jan 21 06:58:26 EST 2004

"Dag Stenberg" <dag.stenberg at nospam.helsinki.fi.invalid> wrote in message
news:bulclf$nc9$2 at oravannahka.helsinki.fi...
> In bionet.neuroscience k p  Collins <kpaulc@[----------]earthlink.net>
> > Hi Dag,
> > There is one question that, since you study
> > sleep-correlated dynamics, I'm hoping you
> > can answer.
> >
> > How does the brain feed-forward to the
> > retina during dream-sleep?
> I am not sure it does. Efferent connections to the retina are not so well
> I'll have to check it up.
> Off-hand, I would say that it is well known that later centers in the
> pathway send efferent connections to earlier ones as far as the
> thalamus, but not to the retina. On the other hand, it may be speculated
> that the eye movements during REM sleep might induce some kind of
> activity in the retina by mechanical means. The functional significance
> of such stimulation would be doubtful.
> I might check up later.
> Dag Stenberg

It's been on my to-do list for a long 'time'.

Why I'm interested is with respect to my
hypothes that the image stays on the retina.

If it's so, then dream imagery, which is often
extraordinarily-vivid, would 'have-to' occur
via an internal feed-forward to the retina.

It's a 'sticky-point' - a 'rub' in the mechanics.

I was just hoping that you, or someone else
that read the post, would know.

I've read =something= that can be construed
as active feed-back to the retina, but I've not
yet followed-up.

It's not your problem. I was just being 'lazy'.

I Apologize.

Cheers, ken [k. p. collins]

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