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- Newsgroups: sci.bio
- Path: sparky!uunet!wupost!spool.mu.edu!agate!iat.holonet.net!ken
- From: ken@iat.holonet.net (Ken Easlon)
- Subject: Re: "Falling" Asleep
- Message-ID: <BzsJHL.J31@iat.holonet.net>
- Organization: HoloNet National Internet Access BBS: 510-704-1058/modem
- References: <BzF4sA.Jyx@dcs.glasgow.ac.uk>
- Date: Fri, 25 Dec 1992 01:15:20 GMT
- Lines: 43
-
-
- In article <BzF4sA.Jyx@dcs.glasgow.ac.uk> ,
- jack@dcs.glasgow.ac.uk (Jack Campin) writes:
-
- >geb@cs.pitt.edu (Gordon Banks) wrote:
- >> RGINZBERG@eagle.wesleyan.edu (Ruth Ginzberg) writes:
- >>> Does anyone know what causes the sensation (when just falling asleep)
- >>> of sudden literal falling, followed by a startle reaction that wakes
- >>> you right up?
-
- >what the heck is it FOR? Anything this widespread ought to have some
- >physiological function and evolutionary rationale, surely?
-
- I think it's associated with the disconnection of gravity sensors in the
- sleep state.
-
- This is offered from a strictly subjective point of view, and may not have
- any neuro-biological basis, but when I'm asleep I tend to maintain a
- certain amount of body awareness. For example, if I'm sleeping on my side
- with one knee cocked, I am more likely to have dreams about climbing stairs
- or some similar activity requiring the same body position.
-
- But even though I have a limited amount of body awareness, I have no sense
- of gravity tugging on my body. I have a sense of "down" in the direction
- of my feet (which places the dream ground at a 90 degree angle to waking
- ground, since I dream I'm vertical when in fact I'm horizontal), but in my
- dreams I don't feel the pressure of the earth against my feet, or the
- effort of holding myself erect.
-
- I suspect this gravity disconnect is necessary for dreaming about activity,
- otherwise we'd probably only have dreams of lying down.
-
- As to the occasional falling sensation when falling asleep, perhaps
- sometimes the gravity disconnect occurs before we're fully asleep. On
- these occasions perhaps we feel the absence of gravity before we've
- completely abandoned our gravitational responsibilities.
-
- --
- Ken Easlon | "...somebody spoke and I went into a dream..."
- ken@holonet.net | -Paul McCartney
- Pleasantly Unaffiliated |
-
-
-