http://thebrain.mcgill.ca/flash/i/i_...08_cr_dep.html
PARTS OF THE BRAIN THAT SLOW DOWN OR SPEED UP IN DEPRESSION
includes some pics
Quote:
Why would evolution have allowed the human brain to develop and maintain circuits that can cause depression?
Some potential answers can be found in the animal kingdom. When an animal is faced with a disagreeable situation and can neither fight nor flee, it responds with inhibition of action, a state that resembles depression.
The status of the most subordinate animals in a hierarchy may also have an adaptive value, by preventing them from engaging in fights that could be very costly, or even fatal.
This would also explain why in human beings today, depression is often triggered by events that undermine self-confidence—the equivalent of being defeated by a more dominant animal.
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...not buying this totally, but it sounds like something I read before -- that some of these illnesses serve a purpose.....the depressed people who could not fight or flee found ways to survive and eventualy breed off-spring.
Past time for sleep.
I wish all my friends wellness.
Mari