🚀 go-pugleaf

In article <C0Io7F.BrH@iat.holonet.net> ken@iat.holonet.net (Ken Easlon) writes:
>In article <1993Jan6.182906.23437@spruce.pfc.forestry.ca> ,
>rwinder@PFC.Forestry.CA (Richard Winder) writes quoting Easlon:
>
>I think we're in total agreement here, it's just a matter of clarifying the
>terminology. I distinguish the sense of "down" from the perception of
>gravity (pressure, effort) because I believe the sense of "down" in dreams
>is imagined, coming from the direction of my feet when I dream I am
>standing, where gravity perception when I drift back to wakefulness is
>coming from another angle.


Some time back in this thread there was some discussion of "gravity sensors"
being disconnected during sleep.  The closest thing to a gravity sensor in 
the human brain is the vestibular system. Although I don't know of any data
concerning the sleep states, it is fairly routine to record vestibular 
evoked activity in the brainstem of deeply anesthetized animals. But I think
the real question being addressed in this discussion is whether vestibular 
information from the brainstem makes its way up to the cerebral cortex during
sleep.  I have no idea what the answer is, and for that matter, I don't
think very much is known about cortical processing of vestibular information
in general.  Hope this helps some.

Matt Spitzer, UC-Stepford  eamg052@orion.oac.uci.edu





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Matt Spitzer, University of California, StepfordD
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Matt Spitzer  eamg052@orion.oac.uci.edue