[Blindtlk] chalking everything up to blindness

[Aziza Cano]

Hi Bob,
Why is it that some totals who have been blind since birth do not have 
problems sleeping. Myself for example can keep a pretty decent sleep 
schedule.

Aziza
----- Original Message ----- 
From: "Robert J Smith" <rsmith247 at csc.com>
To: <blindtlk at nfbnet.org>
Sent: Tuesday, May 25, 2010 8:31 AM
Subject: [Blindtlk] chalking everything up to blindness


> Hi all.  I definitely agree that there is a tendency for health
> professionals to chalk problems up to blindness, but I believe in the case
> of sleep irregularities, there is solid evidence that shows that the brain
> actually needs to see light to keep its day and night cycles regulated. As
> I understand it, when the brain sees light, the production of melatonin
> which causes a person to sleep is held in check.  When a person is in the
> dark, then melatonin is produced, causing sleep.  If a person does not see
> light at all, to the brain, the person is then in a perpetual night
> surrounding so melatonin could be produced at inappropriate times causing
> drowsiness during those times.  Possibly the taking of Melatonin
> externally, regulates this a little more.
>
> Bob Smith
>
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