This document defines key terms related to bipolar disorder and outlines the objectives, causes, symptoms, diagnostic criteria, and treatment approaches for the different types of bipolar disorder according to the DSM-IV-TR. It discusses bipolar I disorder, bipolar II disorder, cyclothymia, and the symptoms and diagnostic criteria for mania, hypomania, depression, and mixed episodes. The causes of bipolar disorder discussed include genetic, biological, neurological, cognitive, and psychosocial factors.