Bach was a German composer of the Baroque period and virtuoso organist. His music is notable for its intellectual rigor and emotional expressiveness. Read Full Biography. 1  Overview 2  â. Biography 3  â. Compositions 4  â. Credits 5  â. Related â.
Diagnostic criteria for bipolar and related disorders are based on the specific type of disorder: 1  Bipolar I disorder. 2  Bipolar II disorder. 3  Cyclothymic disorder. 4  Other types.
Bipolar disorder affects approximately 5.7 million adult Americans, or about 2.6% of the U.S. population age 18 and older every year. The median age of onset for bipolar disorder is 25 years (National Institue of Mental Health), although the illness can start in early childhood or as late as the 40's and 50's.