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Abstract
People with multiple sclerosis (MS) often experience poor balance and increased sway during standing, but their balance strategies are not well understood. This study compared MS patients and healthy controls using coherence and cophase analysis of trunk and leg movements. Thirty-seven MS subjects and 20 controls stood quietly under eyes-open and eyes-closed conditions. Results showed that moderate MS patients had lower coherence at low frequencies and near-zero cophase, indicating reduced or uncoordinated ankle strategy use. Accelerometry produced similar coherence trends to kinematics, suggesting its potential for measuring balance strategies. Findings highlight altered postural control in MS and support further research.