Apraxia as a Predictor of Poststroke Recovery: Insights From the Birmingham Cognitive Screening Program

Area of Science:

• Neurology
• Rehabilitation Medicine
• Cognitive Science

Background:

• Limb apraxia is a common post-stroke deficit impacting daily activities.
• Early assessment of limb praxis may offer prognostic insights for stroke recovery.

Purpose of the Study:

• To determine if early subacute limb praxis scores predict long-term activities of daily living (ADL) outcomes after stroke.
• To evaluate the added prognostic value of limb praxis assessment beyond other cognitive deficits.

Main Methods:

• A longitudinal observational study of 256 stroke survivors from the Birmingham Cognitive Screen (BCoS) cohort.
• Limb praxis and cognitive functions were assessed subacutely (<1 month post-stroke) and functional outcomes (Barthel Index) were measured chronically (>9 months).
• Stepwise multiple linear regression was used to predict chronic Barthel Index scores from subacute cognitive and praxis performance.

Main Results:

• Higher subacute limb praxis scores significantly predicted better chronic ADL outcomes.
• Specific praxis subtests, including gesture production, recognition, and imitation, showed prognostic value.
• The model including praxis measures explained 60% of Barthel Index variance, outperforming a model without praxis.

Conclusions:

• Early and detailed limb praxis testing provides independent prognostic value for long-term ADL outcomes in stroke survivors.
• Incorporating limb praxis assessment into routine post-stroke evaluations can help target rehabilitation efforts more effectively.