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Int J Geriatr Psychiatry. 2013 Feb;28(2):142-8. doi: 10.1002/gps.3801. Epub 2012 Mar 26.

Neurocognitive functioning in early-onset and late-onset older patients with euthymic bipolar disorder.

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1
Bipolar Disorder Program, Institute of Neurosciences, Favaloro University, Buenos Aires, Argentina.

Abstract

OBJECTIVE:

Most neurocognitive studies have not taken into account the fact that older patients with bipolar disorder (BD) are a heterogeneous population. The main goal of this study was to compare neurocognitive performance and extrapyramidal symptoms in older patients with early-onset BD (EO-BD) and late-onset BD (LO-BD).

METHODS:

Euthymic older patients with EO-BD (n = 20), LO-BD (n = 20), and healthy controls (n = 20) were evaluated with traditional clinical instruments and measures of exposure to psychotropic drugs, as well as extrapyramidal symptoms. All subjects completed an extensive neuropsychological battery.

RESULTS:

Patients with EO-BD showed poorer performance than healthy controls in two measures of verbal memory and two measures of executive functions, whereas patients with LO-BD exhibited lower performance scores than healthy controls in almost all of the measures assessed. Impairments in the LO-BD group included even neurocognitive domains typically spared in mixed-age patients. Additionally, there was a trend toward displaying higher extrapyramidal symptoms in the LO-BD group compared with both EO-BD and healthy control groups. In both patient groups, psychosocial functioning was related with executive dysfunction and extrapyramidal symptoms.

CONCLUSIONS:

Patients with LO-BD may have more extensive and severe cognitive impairments, as well as higher vulnerability to extrapyramidal symptoms, compared with patients with EO-BD. Cognitive-motor disturbances may help to explain impairments in daily functioning among older patients with EO-BD and LO-BD during remission.

PMID:
22451354
DOI:
10.1002/gps.3801
[Indexed for MEDLINE]

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