Multidomain cognitive dysfunction after minor stroke suggests generalized disruption of cognitive networks

Area of Science:

• Neurology
• Cognitive Neuroscience
• Stroke Research

Background:

• Minor strokes, despite typically good functional outcomes, can lead to significant cognitive impairment.
• Understanding the pattern and evolution of these deficits is crucial for patient care.

Purpose of the Study:

• To examine cognitive deficits in patients with minor stroke.
• To determine the evolution of these deficits over time.
• To identify factors associated with cognitive outcomes after minor stroke.

Main Methods:

• A longitudinal study assessed patients with minor stroke (NIH Stroke Scale ≤ 10) at 1, 6, and 12 months post-infarct.
• Cognitive domains including global cognition, memory, processing speed, and executive function were evaluated.
• Regression models identified factors associated with initial performance and recovery.

Main Results:

• At 1 month, all patients exhibited cognitive scores below normative ranges.
• Significant improvement in global cognition was observed between 1 and 6 months for 98% of patients.
• Higher education, occupational class, and Caucasian race were linked to better recovery scores.

Conclusions:

• Cognitive impairment is common after minor stroke, suggesting a global network dysfunction that improves over six months.
• Recovery from cognitive deficits can be predicted by baseline factors.