Pupillary response could be used as a valid and reliable neurophysiological measure of cognitive workload in individuals with Parkinson’s disease (PD).
Why this matters
To optimize motor control, performing a dual-task balance might increase the reliance on cognitive resources.
Evidence shows that pupillary response reflects cognitive workload (mental effort) in people with PD, but the lack of validity and reliability testing limits its use as a neurophysiological tool.
This study demonstrated excellent reliability and validity of pupillary response during dual-task balance in individuals with PD, which is important for predicting people who are at risk of falls and for developing new rehabilitation strategies.