Although depression is the most common presentation of bipolar disorder, correct diagnosis generally requires a history of mania and thus presents a formidable challenge. This book provides clinicians with the necessary guidance to distinguish this illness and pursue an appropriate therapeutic course. It brings together a team of clinical investigators who offer cutting-edge research on the topic and address the most critical concerns regarding its treatment. Bipolar Depression first introduces a hierarchical model for diagnosis to allow the clinician to distinguish between bipolar and unipolar depression, addressing problems of misdiagnosis and overdiagnosis as well as differentiating attention-deficit/hyperactivity disorder (ADHD) and bipolar disorder. Early chapters review the neurobiology and genetics of this highly heritable condition, presenting studies of neurotransmitter function and brain imaging studies and documenting the susceptibility of specific chromosomes as loci for