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Joe R. Nocera, PhD; Ryan Roemmich; Jonathan Elrod; Lori J. P. Altmann, PhD; Chris J. Hass, PhD

Effects of cognitive task on gait initiation in Parkinson disease: Evidence of motor prioritization?. Joe R. Nocera, PhD; Ryan Roemmich; Jonathan Elrod; Lori J. P. Altmann, PhD; Chris J. Hass, PhD. Aim

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Joe R. Nocera, PhD; Ryan Roemmich; Jonathan Elrod; Lori J. P. Altmann, PhD; Chris J. Hass, PhD

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  1. Effects of cognitive task on gait initiation in Parkinson disease: Evidence of motor prioritization? Joe R. Nocera, PhD; Ryan Roemmich; Jonathan Elrod; Lori J. P. Altmann, PhD; Chris J. Hass, PhD

  2. Aim • Investigate effect of concurrent cognitive task on gait initiation in patients with Parkinson disease, healthy older adults, and healthy young adults. • Relevance • While much is known about effects of dual tasking on cyclical and continuous motor performance, there is little information on effect of dual tasking on movement initiation.

  3. Method • Examined anticipatory postural adjustment displacements (APA) and velocities during: • Single-task gait initiation. • Two dual-task conditions: • 0-back + gait initiation. • 2-back + gait initiation.

  4. Results • Parkinson disease group exhibited less APA displacement and velocity than their aged-matched healthy peers and young adults during single- and dual-task gait initiation (p < 0.05). • There was no additional effect on APA displacement or velocity of gait initiation during dual-task conditions in any group.

  5. Conclusion • More traditionally studied gait/balance dual-task paradigms have demonstrated both motor and cognitive decline. • Therefore, our results suggest prioritization of more “intentional” movement task (e.g., gait initiation) while dual tasking in Parkinson disease.

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