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Mood Disorder Definitions

Major Depressive Episode[1] - At least 5 of the following symptoms, one of which must be depressed mood or loss of interest/pleasure,  in the same 2 week period:

  • Insomnia

  • Hypersomnia

  • Depressed mood

  • Loss of interest or pleasure

  • Feelings of worthlessness

  • Fatigue

  • Diminished ability to think or make decisions

  • Increased/decreased appetite

  • Psychomotor retardation or agitation

  • Hopelessness

  • Suicidal thoughts

Other symptoms: diminished sex drive, avoidance of other people, overwhelming feelings of sadness or grief

Manic Episode[1] - A period of abnormally elevated, expansive, or irritable mood, lasting at least 1 week.

Mixed episode[1] - Contains features of a major depressive episode and a manic episode nearly every day for 1 week.

Hypomanic episode[1] - A period of abnormally elevated, expansive, or irritable mood, lasting 4 days, no impairment in social or occupational functioning.

Major Depressive Disorder[1] - 2 or more major depressive episodes, absence of manic, hypomanic, or mixed episode

Test yourself on these definitions.

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1. Toronto Notes 2004: Review for the MCCQE. Eds: A. Molckovsky and KS Pirzada. Toronto Notes Publishing 2004, Toronto.

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