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Verbal fluency dysfunction in euthymic bipolar patients: a controlled study.

Cristiana Castanho de Almeida Rocca1, Márcia Britto de Macedo-Soares, Clarice Gorenstein

  • 1Psychology and Neuropsychology, Institute of Psychiatry, University of São Paulo Medical School, Brazil. crisrocca@uol.com.br

Journal of Affective Disorders
|August 25, 2007
PubMed
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Euthymic bipolar patients show deficits in verbal fluency compared to healthy individuals. These executive functioning impairments correlate with clinical history, including psychotic symptoms and hospitalizations.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Bipolar disorder is a mood disorder characterized by manic and depressive episodes.
  • Executive functions, crucial for cognitive control, may be impaired in bipolar disorder.
  • Understanding these deficits is vital for effective treatment and management.

Purpose of the Study:

  • To compare executive functioning in euthymic bipolar patients versus healthy controls.
  • To investigate the association between neuropsychological deficits and clinical variables in bipolar disorder.

Main Methods:

  • A cohort of 25 euthymic bipolar patients and 31 healthy controls were recruited.
  • Participants completed a battery of executive function tests, including measures of mental flexibility, inhibitory control, and verbal fluency.

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Main Results:

  • No significant differences were found in mental flexibility or inhibitory control between groups.
  • Bipolar patients demonstrated significantly poorer performance on verbal fluency tests compared to controls.
  • Impaired performance on specific tests (Stroop, Hayling and Brixton) correlated with lifetime psychotic symptoms, episode history, and hospitalizations.

Conclusions:

  • Verbal fluency deficits are a key differentiator of euthymic bipolar patients from healthy controls.
  • Executive function impairments, particularly in information processing speed and inhibitory control, are linked to a more severe clinical course in bipolar disorder.