Relationship between executive function and dual-task walking in people with Parkinson's disease

Area of Science:

• Neuroscience
• Movement Disorders
• Cognitive Function

Background:

• Cognitive impairment, particularly executive dysfunction, is common in Parkinson's disease (PwPD) and can affect gait.
• Previous research on the link between dual-task walking and executive function in PwPD yielded inconsistent results.
• The specific impact of executive function subdomains on dual-task walking remains underexplored.

Purpose of the Study:

• To investigate the correlation between dual-task walking and specific executive function subdomains in PwPD.
• To assess the predictive power of different executive function subdomains on dual-task walking performance in PD.

Main Methods:

• A cross-sectional study involving 30 PwPD.
• Gait assessment under single-task, cognitive dual-task, and motor dual-task walking conditions.
• Executive function evaluation using the Trail Making Test (TMT), Stroop Color and Word Test (SCWT), and Digit Span Test (DST).

Main Results:

• Walking speed during dual-task conditions correlated with TMT Part A and SCWT performance.
• Stride length during dual-task walking showed broader correlations with multiple executive function measures.
• The SCWT was the sole significant predictor of walking speed under both dual-task conditions; it also predicted stride length in cognitive dual-tasking, alongside the Forward Digit Span Test (DST) in motor dual-tasking.

Conclusions:

• The SCWT demonstrates the strongest association with dual-task gait performance in PwPD.
• Inhibitory control, as measured by the SCWT, is crucial for regulating dual-task walking in individuals with Parkinson's disease.