Unipolar depression and bipolar depression are both categorized as mood disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). Mood disorders are characterized by distorted fluctuations in emotion and mood that interfere with normal, daily functioning. An individual that possesses a mood disorder has difficulty regulating and staying in control of their emotions. The Latin prefix “uni” means one, or single, while the Latin prefix “bi” means having two. True to their prefixes, unipolar depression is comprised of one type of depression, while bipolar depression is comprised of both depression and mania.