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RE: cerebral blood flow during sleep [HAPP-L]

TOTAL cerebral blood flow never really changes (except due to disease). I assume that this is what you are asking about... The total amount of blood that flows through the cerebral vasculature in a given period of time. Blood flow to specific areas of the cortex may be altered by local arterioconstriction/dilation.

D. Ford
St Louis College of Pharmacy

-----Original Message-----
From: Marc Walters [mailto:mwalters@xxxxxxx]
Sent: Friday, January 10, 2003 1:04 PM
To: HAPP-L@xxxxxxxxxxxxxxxxxxxxxxxxx
Subject: cerebral blood flow during sleep [HAPP-L]
Are there any neurophysiologists (or others) that can settle a disagreement for me?
I thought that cerebral blood flow increased to areas of brain that are active; this is the basis for scans such as the functional MRI scan.
A student in my lecture said that his psychology text stated that cerebral blood flow is the same during sleep and the awake state. I think that cerebral blood flow would be decreased during sleep. 

Thanks in advance!


Yours truly,

Marc


Marc H. Walters, M.D.           Internet: mwalters@xxxxxxx
Biology                         Telephone: (503)977-4404
PCC Sylvania                            FAX:  503-977-8164
PO Box 19000
Portland, OR  97280-0990


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