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Bipinnaria
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bipolar disorder definitions

WordNet (r) 3.0 (2005)

n
1: a mental disorder characterized by episodes of mania and depression [syn: bipolar disorder, manic depression, manic depressive illness, manic-depressive psychosis]

Merriam Webster's

noun Date: 1980 any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania called also manic depression, manic-depressive illness

Britannica Concise

Mental illness characterized by the alternation of manic and depressive states. Depression is the more common symptom, and many patients experience only a brief period of overoptimism and mild euphoria during the manic phase. The condition, which seems to be inheritable, probably arises from malregulation of the amines norepinephrine, dopamine, and 5-hydroxytryptamine. It is most commonly treated with lithium carbonate.



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