Individuals with bipolar disorder or those with a history of bipolar disorder may have certain structural changes in their brain. The purpose of this study is to look at those changes, as well as the assessment of risk factors for bipolar disorders, involving both social and psychological aspects of behavior, age, education, marital relations, nutrition, physical activity, etc., compared with persons not having bipolar disorder. These changes in the brain will be measured by Magnetic Resonance Imaging (MRI).