Bipolar disorder is an academic concept and prominent research area within psychiatry and neuroscience, investigating a complex mood disorder characterized by recurrent episodes of elevated, expansive, or irritable mood (mania or hypomania) alternating with periods of depression. Research in this field focuses on elucidating its genetic, neurobiological, psychological, and environmental etiologies, clinical phenomenology, diagnostic criteria, longitudinal course, and developing effective pharmacological and psychosocial interventions to mitigate its significant burden of morbidity and mortality.