The effects of two different auditory stimuli on functional arm movement in persons with Parkinson’s disease a dual-task paradigm
Resource
CLINICAL REHABILITATION v.23 n.3 pp.229-237
Journal
CLINICAL REHABILITATION
Journal Volume
v.23
Journal Issue
n.3
Pages
229-237
Date Issued
2009
Date
2009
Author(s)
Ma, Hui-Ing
Hwang, Wen-Juh
Lin, Keh-Chung
Abstract
Objective: To examine, in a dual-task paradigm, the effect of auditory stimuli on
people with Parkinsonâ s disease.
Design: A counterbalanced repeated-measures design.
Setting: A motor control laboratory in a university setting.
Subjects: Twenty individuals with Parkinsonâ s disease.
Experimental conditions: Each participant did two experiments (marching music
experiment and weather forecast experiment). In each experiment, the participant
performed an upper extremity functional task as the primary task and listened to an
auditory stimulus (marching music or weather forecast) as the concurrent task. Each
experiment had three conditions: listening to the auditory stimulus, ignoring the
auditory stimulus and no auditory stimulus.
Main measures: Kinematic variables of arm movement, including movement time,
peak velocity, deceleration time and number of movement units.
Results: We found that performances of the participants were similar across the
three conditions for the marching music experiment, but were significantly different
for the weather forecast experiment. The comparison of condition effects between
the two experiments indicated that the effect of weather forecast was (marginally)
significantly greater than that of marching music.
Conclusions: The results suggest that the type of auditory stimulus is important to
the degree of interference with upper extremity performance in people with
Parkinsonâ s disease. Auditory stimuli that require semantic processing (e.g. weather
forecast) may distract attention from the primary task, and thus cause a decline in
performance.
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