Saturday, June 20, 2009

Depression: What Is It?

It's natural to feel down sometimes, but if that low mood lingers day after day, it could signal depression. Major depression is an episode of sadness or apathy that lasts at least two consecutive weeks and is severe enough to interrupt daily activities. Depression is not a sign of weakness or a negative personality. It is a major public health problem and a treatable medical condition.
Shown here is a PET scan revealing "hot spots" of increased activity in a non-depressed brain.

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