Resilience of visually guided weight shifting to a proprioceptive perturbation depends on the complexity of the guidance stimulus |
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| Institution: | 1. Department of Physical Education and Sport Sciences, Aristotle University of Thessaloniki, Thessaloniki 54006, Greece;2. Department of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, Serres 62110, Greece;3. INSERM U1093-CAPS, UFR des Sciences du Sport, Université Bourgogne Franche-Comté, F-21000 Dijon, France;1. Neuromotor and Cognitive Rehabilitation Research Center, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy;2. Neurorehabilitation Unit, Department of Neurosciences, University Hospital of Verona, Verona, Italy;1. Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy;2. IRCSS Neurological Institute “C. Mondino”, Pavia, Italy;1. Neuromotor and Cognitive Rehabilitation Research Center, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy;2. Neurorehabilitation Unit, Department of Neurosciences, University Hospital of Verona, Verona, Italy;1. Department of Kinesiology and Health Science, Utah State University, Logan, UT, USA;2. Sorenson Center for Clinical Excellence, Utah State University, Logan, UT, USA;3. Trinity College Institute of Neuroscience, Trinity College Dublin, Ireland;4. Global Brain Health Institute, Trinity College Dublin, Ireland;5. School of Psychology, Trinity College Dublin, Ireland;1. INSERM, CIC 1432, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;2. CHU Dijon-Bourgogne, Centre d’Investigation Clinique, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;1. INSERM, CIC 1432, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;2. CHU Dijon-Bourgogne, Centre d’Investigation Clinique, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;3. CHU Dijon-Bourgogne, Service de Rhumatologie, Dijon, France;4. INSERM, UMR1093-CAPS, Université de Bourgogne Franche Comté, UFR des Sciences du sport, F-21000 Dijon, France;1. INSERM, CIC 1432, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;2. CHU Dijon-Bourgogne, Centre d’Investigation Clinique, Module Plurithématique, Plateforme d’Investigation Technologique, Dijon, France;3. INSERM, UMR1093-CAPS, Université de Bourgogne Franche Comté, UFR des Sciences du sport, F-21000 Dijon, France |
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| Abstract: | BackgroundWhole-body tracking of visual motion cues is used in balance training to improve weight shifting ability in old age and sports.Research questionHow tracking of a complex (pink noise) and a periodic visual target motion during anteroposterior weight shifting affects postural and muscle responses to unilateral hip vibration.MethodsTwenty-six participants performed 160 anteroposterior weight shifting cycles while tracking the vertical motion of a visual target, concurrently receiving Center of Pressure (CoP) feedback. They were randomly divided to groups; (a) the Constant group tracked a visual target motion constructed by 3 sinusoids of different amplitude, and (b) the Pink group tracked a complex visual target motion constructed by a pink noise generation process. Between the 60th and the 120th cycle, vibration was applied to the right gluteus medius, introducing a sideways CoP deviation. CoP displacement and electromyographic (EMG) responses of soleus, tibialis anterior and peroneus longus were recorded and summarized in blocks of 3 cycles.ResultsSideways CoP deviation induced at the onset/offset of unilateral hip vibration was smaller for the Pink than the Constant group. The Pink group demonstrated greater tibialis anterior and peroneus longus EMG activity around the most anterior sway peak while soleus EMG was similar for the two groups. Both groups successfully coupled weight shifting amplitude to the target motion, but the Pink group tracked the target motion with a greater delay compared to the Constant group.SignificanceWhole body tracking of complex visual motions evokes perception-based action and increases ankle muscle co-activation making sway more resilient to a proprioceptive perturbation induced by unilateral hip vibration. Complex visual guidance motions should be considered when designing balance rehabilitation regimes, aiming at improving weight shifting ability and dynamic balance control. |
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| Keywords: | Balance training Whole body tracking Visual feedback Hip vibration |
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