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A Comparison of Two Simultaneous Task Protocols for the Assessment of Parkinson’s Disease

By Brewer, Bambi R.; RESNA/ICTA 2011: Advancing Rehabilitation Technologies for an Aging Society, June 5-8, 2011, Toronto, Canada,
Publication Date: 2011

Study compared the effects of two simultaneous task protocols on fine motor performance in individuals with Parkinson’s disease (PD). One protocol uses force tracking combined with a simultaneous cognitive task, while the other simulates the functional task of moving an object while maintaining a certain grip force. Participants were 11 adults with PD. The experimental environment included two PHANTOM 1.5 Premium HF robots and two NANO-17 force/torque sensors. Each trial consisted of force tracking followed by position tracking. During the force tracking protocol, participants sat with the arm stationary and grasped a virtual object created using the PHANTOM robots while using the force exerted by the thumb and index finger on the virtual object to track a target wave shown on a computer screen. The task was performed while simultaneously counting down from 100 by 3. During the position tracking protocol, participants moved a virtual object created by the haptic robots along a target path shown on the computer screen, while simultaneously maintaining the grip force on the virtual object within a specified range. Participants performed the protocols for two target waves, a sine wave and a pseudorandom wave, using both the right and left hands, for a total of 4 trials per individual. Results showed that performance of a simultaneous, unrelated cognitive task was associated with a deterioration in force tracking performance in individuals with PD. Performance of a second motor task during position tracking did not result in a deterioration in tracking performance. Implications for future research exploring how simultaneous functional motor tasks are affected by PD are discussed.
Published by: Rehabilitation Engineering & Assistive Technology Society of North America (RESNA)   (Website:http://www.resna.org)

Rehabilitation Engineering & Assistive Technology Society of North America (RESNA)    (Web Site: http://www.resna.org )
Link to text: http://web.resna.org/conference/proceedings/2011/RESNA_ICTA/brewer-69742.pdf
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