It has been postulated that depression may be a syndrome that reflects either activity or lack of activity in what areas of the brain? (Select all that apply.)
A) Limbic system
B) Corpus callosum
C) Reticular activating system (RAS)
D) Substantia nigra
E) Basal ganglia
A, C, E
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Depression also may occur as a result of other, yet unknown causes. This condition may be a syndrome that reflects either activity or lack of activity in a number of sites in the brain, including the arousal center (i.e., RAS), the limbic system, and basal ganglia. It is not theorized that depression is associated with the corpus callosum or the substantia nigra.
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