Stroke walking and balance characteristics via principal component analysis.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: The authors declare no competing interests. 9. Clin Biomech (Bristol). 2022 Aug;98:105740. doi: 10.1016/j.clinbiomech.2022.105740. Epub 2022 Aug 14. Lower-limb joint-coordination and coordination variability during gait in children with cerebral palsy. Dussault-Picard C(1), Ippersiel P(2), Böhm H(3), Dixon PC(4). Author information: (1)School of Kinesiology and Physical Activity Sciences, Faculty of Medicine, University of Montreal, Canada; Research Center of the Sainte-Justine University Hospital (CRCHUSJ), Canada. Electronic address: cloe.dussault-picard@umontreal.ca. (2)School of Physical and Occupational Therapy, McGill University, Canada; Centre for Interdisciplinary Research in Rehabilitation of Greater Montreal, Lethbridge-Layton-Mackay Rehabilitation Centre, Canada. (3)Orthopaedic Hospital for Children, Behandlungszentrum Aschau GmbH, Bernauerstr, Chiemgau, Germany. (4)School of Kinesiology and Physical Activity Sciences, Faculty of Medicine, University of Montreal, Canada; Research Center of the Sainte-Justine University Hospital (CRCHUSJ), Canada. BACKGROUND: Children with cerebral palsy present with poor motor control, altering their ability to perform tasks such as walking. Continuous relative phase analysis is a popular method to quantify motor control impairments via inter-joint coordination and coordination variability; however, it has not been explored in children with cerebral palsy. METHODS: 45 children with cerebral palsy and 45 typically developing children walked while fit with retroreflective markers. Continuous relative phase analysis for knee-hip and ankle-knee joint pairs quantified inter-joint coordination and coordination variability. The Gait Profile Score estimated gait pathology. Group differences were assessed with unpaired t-tests for coordination amplitude and variability (knee-hip, ankle-knee) across gait events. For the cerebral palsy group, correlations assessed the relation between the gait profile score and coordination metrics. FINDINGS: The cerebral palsy group showed more in-phase patterns for knee-hip coupling compared to the typically developing group (initial contact, loading response, mid-stance, terminal swing) (p ≤ 0.03). The cerebral palsy group showed lower knee-hip coordination variability (mid-stance, mid-swing) (p ≤ 0.037) and lower ankle-knee coordination variability (initial contact, loading response, terminal swing) (p