Cognitive Impairment in Bipolar Disorder: Comparison with Cognitive Impairment in Schizophrenia

The present commentary aims to investigate findings of cognitive impairment in bipolar disorder in comparison with those in schizophrenia. Bipolar disorder may share a subtle neurodevelopmental deviation with schizophrenia. However, premorbid enhanced cognitive function can be a risk factor only for bipolar disorder. Performance patterns of social and nonsocial cognition may be oppositional between the two disorders. Comparison of cognitive impairment between bipolar disorder and schizophrenia needs to consider the possibility of cognitive heterogeneity within each disorder.