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Mood Disorders

  1. Elaine M. Heiby,
  2. Qijuan Fang

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy0555

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

Heiby, E. M. and Fang, Q. 2010. Mood Disorders. Corsini Encyclopedia of Psychology. 1–2.

Author Information

  1. University of Hawaii at Manoa

Publication History

  1. Published Online: 30 JAN 2010


Mood disorders refer to conditions involving maladaptive expression of any of three basic emotions—sadness, happiness, and anger—and their corresponding thoughts and actions. These three emotions are usually considered to be naturally adaptive reactions to changes that involve loss, gain, or obstruction, respectively. Adaptive reactions to such changes are associated with an eventual return to a euthymic (neutral or somewhat positive) mood state.


  • sadness;
  • happiness;
  • anger;
  • depression;
  • mania