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  • Title: Parkinson's gait kinematics deteriorates across multiple cognitive domains under dual-task paradigms.
    Author: Penko AL, Streicher MC, Dey T, Rosenfeldt AB, Alberts JL.
    Journal: Clin Neurol Neurosurg; 2020 Oct; 197():106083. PubMed ID: 32683199.
    Abstract:
    OBJECTIVE: The symptoms of Parkinson's disease (PD) in many circumstances lead to gait dysfunction which contribute to decreased mobility, reduced quality of life, and increased risk of falling. Dual-task conditions have been shown to amplify gait dysfunction from a spatiotemporal parameter standpoint; however, less is known regarding gait joint kinematics under dual-task conditions in PD, specifically across multiple cognitive domains. The purpose of this project was to systematically characterize lower extremity joint kinematics in individuals with mild-moderate PD under dual-task paradigms across multiple cognitive domains. PATIENTS AND METHODS: Twenty-three individuals with idiopathic Parkinson's disease participated in this observational study evaluating hip, knee, and ankle joint kinematics while walking on a self-paced treadmill under dual-task conditions that taxed memory, attention, verbal fluency, and information processing. RESULTS: Gait velocity and range of motion at the ankle, knee, and hip decreased (p < 0.05) under all of the dual-task conditions. Hip kinematics were affected to a greater extent than the ankle and knee, with reduction in flexion and extension during all timestamps of the gait cycle (p < 0.05) under all dual-task conditions. CONCLUSION: The worsening of gait kinematics under dual-task conditions regardless of the aspect of cognition being challenged suggest that information processing and motor output are unable to withstand dual-task loads without consequence. These study results provide insight for target areas to focus on during therapeutic interventions in order to help minimize gait kinematic decrements observed under dual-task conditions.
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