Effects of sensory manipulations on the dynamical structure of center-of-pressure trajectories of children with cerebral palsy during sitting |
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| Affiliation: | 1. Human Health and Nutritional Sciences, University of Guelph, Canada;2. Schlegel-UW Research Institute for Aging, Kitchener, ON, Canada;1. School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, EEFERP-USP, São Paulo, Brazil;2. Institute of Physical Activity and Sport Sciences and Graduate Program in Human Movement Sciences, Cruzeiro do Sul University, São Paulo, Brazil;3. Institute of Bioscience, São Paulo State University, Rio Claro, Brazil;1. Research and Development Section, Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA;2. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA;3. Department of Rehabilitation Medicine, Center for the Intrepid, Brooke Army Medical Center, San Antonio, TX, USA;4. Department of Rehabilitation Medicine, Uniformed Service University of the Health Sciences, Bethesda, MD, USA;5. Research & Surveillance Division, DoD-VA Extremity Trauma & Amputation Center of Excellence, USA;6. Physical Therapy Department, Naval Medical Center San Diego, San Diego, CA, USA;7. Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, USA;8. Department of Surgery, Uniformed Service University of the Health Sciences, Bethesda, MD, USA;9. Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA;1. Department of Kinesiology, California State University Fullerton, 800 North State College Blvd., Room KHS-121, Fullerton, CA 92834, USA;2. School of Human Kinetics, University of Ottawa, Montpetit Hall, 125 University, Room 232, Ottawa, ON K1N 6N5, Canada;3. Centre for Neuroscience Studies, Queen’s University, Botterell Hall, 18 Stuart Street, Kingston, ON K7L 3N6, Canada;4. Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON L8S 4K1, Canada;1. Research Centre for Musculoskeletal Science & Sports Medicine, Manchester Metropolitan University, Manchester, UK;2. School of Computing Mathematics and Digital Technology, Manchester Metropolitan University, Manchester, UK |
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| Abstract: | Aim: To investigate the effects of manipulating visual information and the compliance of the support surface on the area of sway and dynamical trajectories of center-of-pressure (CoP) in children with CP and children with typical development during static sitting. Methods: 32 typical children, 14 children with mild CP and 12 with moderate-to-severe CP were tested for CoP sway during static sitting under four sensory conditions: (1) eyes open on a rigid surface; (2) eyes closed on a rigid surface; (3) eyes open on foam; (4) eyes closed on foam. Results: Children with moderate-to-severe CP showed greater regularity and local stability of dynamical CoP trajectories and lower complexity in their motor patterns than typical children and children with mild CP. Moreover, removing vision and sitting on a compliant surface reduced the regularity of CoP trajectories. Conclusion: Children with CP were able to adjust the structure and complexity of their postural control responses to sensory challenges, although the structure of their postural responses was poorer than in typical children. |
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| Keywords: | Children Cerebral palsy Postural control Sensory Nonlinear analysis |
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