Neuropsychological frontal lobe tests indicate that bipolar depressed patients are more impaired than unipolar

Bipolar Disorders
A Borkowska, J K Rybakowski

Abstract

The aim of this study was to compare the neuropsychological performance of patients with bipolar or unipolar mood disorders during acute episodes of depression using intelligence and frontal lobe tests. Fifteen patients with bipolar depression (BP) and 30 with unipolar depression (UP) were studied. For the neuropsychological assessment, the following tests: the Wechsler Adult Intelligence Scale-Revised (WAIS-R), the Trail Making Test (TMT), the Stroop test, the verbal fluency test and the Wisconsin Card Sorting Test (WCST) were used. The mean intensity of depression and mean duration of illness were similar in both groups. Patients in the BP group achieved significantly lower levels of performance in the non-verbal part of WAIS-R, in both parts of the Stroop test, in the verbal fluency test and also showed a tendency to achieve poorer results in TMT-B than those in the UP group. Bipolar depressed patients also produced significantly poorer results with the WCST as they made twice as many perseverative errors and only completed half of the correct categories compared with the UP patients. The results of the TMT-A tests, which measure psychomotor slowness, were similar in BP and UP patients. No differences between the results of ...Continue Reading

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Bipolar Disorder

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