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سی و دومین کنفرانس ملی و دهمین کنفرانس بین المللی مهندسی زیست پزشکی ایران
Postural Responses to Mediolateral Perturbations: Contributions of Surface, Vision, and Cognitive Load
Authors :
Haniyeh Zahra Budaqi
1
Ali Mojibi
2
Saeed Behzadipour
3
1- صنعتی شریف
2- صنعتی شریف
3- صنعتی شریف
Keywords :
Postural Control،Mechanical Disturbance،Dynamic postural assessment،Center of Pressure،COP Measures
Abstract :
Maintaining postural stability is a complex process influenced by sensory, motor, and cognitive factors. Dynamic balance tests provide valuable insight into these mechanisms by challenging balance under controlled conditions. This study investigated the effects of surface type, visual availability, and cognitive load on postural control during mediolateral rotational disturbances in healthy young adults. Fifteen participants completed trials on a robotic balance platform under eight conditions combining rigid or foam surfaces, eyes open or closed, and with or without a cognitive task. During each trial, ML platform rotations were applied while Center of pressure (COP) responses were recorded. COP data were analyzed across position, velocity, and frequency domains to capture both static and dynamic aspects of postural control. Analysis of variance revealed that vision significantly affected all COP domains, surface type primarily influenced dynamic and frequency measures, and cognitive load altered static and frequency measures. No significant interactions were observed, indicating that each factor contributed independently to balance regulation. These findings suggest that surface, vision, and cognitive load each impose distinct challenges to postural control during ML disturbances, highlighting the importance of evaluating multiple task constraints when assessing balance performance.
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