Bipolar disorder also most known as manic depression is a common recurrent and debilitating mood disorder which causes extreme shifts in energy and mood The word bipolar indicates the two main polar extremes which a person with the disorder experiences According to NMH a branch of the National Institutes of Health NIH that oversees neurological and psychological research this disorder affects about 2 3 million adults in the United States and about 1 2 percent of the population worldwide The first signs of this disorder usually appear in adolescence and early adulthood with cases occurring in childhood Bipolar disorder can sometimes be co morbid with several other disorders including panic disorder social phobia generalized anxiety disorder and substance dependence There are three different types of bipolar disorder most of which are mostly characterized by the presence and or frequency of certain episodes of which there are several kinds Manic episodes normally will last for at least one week and are characterized by persistently irritable and elevated moods euphoria impulsiveness and expansiveness People suffering from a manic episode will usually have racing thoughts and will speak using quick run on sentences They will be noticeably more active than usual get far less sleep engage in several activities at once and be very unorganized in said activities