Bipolar disorder
Bipolar disorder is a mood disorder that is characterized by both highs (mania) and lows (depression) in mood. These changes in mood sometimes alternate rapidly (changes within days or weeks) and sometimes not so rapidly (within weeks or months). Current research provides strong evidence of cognitive impairments in individuals with bipolar disorder, particularly in executive function and verbal learning. Moreover, these cognitive deficits appear to be consistent cross-culturally, indicating that these impairments are characteristic of the disorder and not attributable to differences in cultural values, norms, or practice. Functional neuroimaging studies have implicated abnormalities in the dorsolateral prefrontal cortex and the anterior cingulate cortex as being volumetrically different in individuals with bipolar disorder.