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Communication Sciences and Disorders Commons™
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Full-Text Articles in Communication Sciences and Disorders
Dual-Task Interference: The Effects Of Verbal Cognitive Tasks On Upright Postural Stability In Parkinson's Disease, J. Holmes, M. Jenkins, Andrew Johnson, S. Adams, S. Spaulding
Dual-Task Interference: The Effects Of Verbal Cognitive Tasks On Upright Postural Stability In Parkinson's Disease, J. Holmes, M. Jenkins, Andrew Johnson, S. Adams, S. Spaulding
Andrew M. Johnson
Although dual-task interference has previously been demonstrated to have a significant effect on postural control among individuals with Parkinson's disease, the impact of speech complexity on postural control has not been demonstrated using quantitative biomechanical measures. The postural stability of twelve participants with idiopathic Parkinson's disease and twelve healthy age-matched controls was evaluated under three conditions: (1) without a secondary task, (2) performing a rote repetition task and (3) generating a monologue. Results suggested a significant effect of cognitive load on biomechanical parameters of postural stability. Although both groups increased their postural excursion, individuals with Parkinson's disease demonstrated significantly reduced …
Dual Task Performance In A Healthy Young Adult Population: Results From A Symmetric Manipulation Of Task Complexity And Articulation, Albert Armieri, Jeffrey Holmes, Sandi Spaulding, Mary Jenkins, Andrew Johnson
Dual Task Performance In A Healthy Young Adult Population: Results From A Symmetric Manipulation Of Task Complexity And Articulation, Albert Armieri, Jeffrey Holmes, Sandi Spaulding, Mary Jenkins, Andrew Johnson
Andrew M. Johnson
The ability to execute and maintain gait while performing simultaneous cognitive, verbal, or motor tasks ('dual-tasking') is beneficial in many ways. It is well-documented, however, that dual-tasking can result in cognitive or motoric interference that results in diminished gait performance, and impaired secondary task performance. When manipulating cognitive load, it is common to have participants respond verbally to stimuli. While this is an ecologically valid way to measure the effects of cognitive load on gait, it ignores the additional demands inherent in the verbal aspect of the task. In the present study, we manipulated complexity and articulation within a single …