Bipolar Disorders

Definition

Bipolar disorders are brain disorders that cause changes in a person's mood, energy and ability to function. People with bipolar disorders have extreme and intense emotional states that occur at distinct times, called mood episodes.

Related terms

Bipolar I Disorder: This is characterized by one or more manic episodes or mixed episodes (symptoms of both mania and depression) and one or more major depressive episodes.

Bipolar II Disorder:

This involves one or more major depressive episodes accompanied by at least one hypomanic episode (a milder form of mania).

Cyclothymic Disorder: A chronic but less severe form of bipolar disorder where individuals experience numerous periods with hypomanic symptoms and numerous periods with depressive symptoms lasting for at least two years.