Executive Function Is Selectively Impaired in Old Age Bipolar Depression.

Area of Science:

• Neuroscience
• Geriatrics
• Psychiatry

Background:

• Cognitive impairments in elderly bipolar disorder (BD) are understudied.
• Neuropsychological deficits in elderly BD patients with early onset are largely unknown.
• Cognitive impairment exacerbates functional decline in elderly BD patients.

Purpose of the Study:

• To evaluate executive functions (EFs) in elderly outpatients with early-onset BD during depressive episodes.
• To characterize the cognitive signature of late-life bipolar depression.
• To identify specific executive function deficits in this population.

Main Methods:

• Assessment of 49 elderly outpatients with early-onset BD.
• Utilized various neuropsychological tests to measure EFs.
• Data collected during the depressive phase of the disorder.

Main Results:

• Executive dysfunction is prevalent in elderly patients with bipolar depression.
• 26.5% of patients presented with a pseudodementia syndrome.
• Impaired performance was noted in Trail Making B, Stroop Test 3, Backward Digit Span, and Wisconsin Card Sorting Test, indicating deficits in working memory, inhibitory control, mental flexibility, and processing speed.

Conclusions:

• The executive dysfunction profile in elderly BD is complex and heterogeneous.
• Common deficits include impaired working memory, inhibitory control, mental flexibility, and processing speed.
• Performance can be categorized into single or multiple EF domain impairments, with or without pseudodementia.