Disrupting somatosensory processing impairs motor execution but not motor imagery |
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| Affiliation: | 1. Neuroplasticity, Imagery, and Motor Behaviour Laboratory, Department of Psychology, University of British Columbia, Okanagan Campus, Kelowna V1V1V7, British Columbia, Canada;2. Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver V6T1Z3, British Columbia, Canada;1. School of Psychology, Shanghai University of Sport, Shanghai 200438, China;2. Heilongjiang Shooting, Cycling and Archery Sports Management Center, Harbin, Heilongjiang 150049, China;3. School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China;4. School of Sport Communication and Information Technology, Shandong Sport University, Jinan, Shandong, China;5. China Table Tennis College, Shanghai University of Sport, Shanghai 200438, China;1. School of Kinesiology, Louisiana State University, Baton Rouge, LA, USA;2. Department of Rehabilitation, Exercise and Nutrition Sciences, College of Allied Health Sciences, University of Cincinnati, Cincinnati, Ohio, USA;1. Department of Physical Therapy, Graduate School of Health Care, Takasaki University of Health and Welfare, Takasaki, Gunma, Japan;2. Department of Rehabilitation, Kurosawa Hospital, Takasaki, Gunma, Japan;3. IRISSE (EA 4075), Department of Sport Sciences (STAPS), University of la Réunion, Tampon, France;1. Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA;2. Department of Kinesiology, The University of Alabama, Tuscaloosa, AL, USA;3. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA;4. Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, MA, USA;5. College of Health and Human Services, University of North Carolina at Charlotte, Charlotte, NC, USA;6. Department of Kinesiology, California State University, Long Beach, Long Beach, CA, USA;1. Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark;2. Department of Health & Kinesiology, Texas A&M University, 4243 TAMU, College Station 77843, TX, USA;3. Department of Nutrition, Exercise and Sports, University of Copenhagen, Nørre Allé 51, 2200 Copenhagen N, Denmark;4. Wellcome Centre for Human Neuroimaging, University College London, 12 Queen Square, London WC1N 3AR, United Kingdom |
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| Abstract: | While motor imagery (MI) is thought to be ‘functionally equivalent’ with motor execution (ME), the equivalence of feedforward and feedback mechanisms between the two modalities is unexplored. Here, we tested the equivalence of these mechanisms between MI and ME via two experiments designed to probe the role of somatosensory processing (Exp 1), and cognitive processing (Exp 2). All participants were engaged in a previously established force-matching task adapted for MI. A reference force was applied (on scale of 1–10, with higher numbers indicative of greater force) to one index finger while participants matched the force with their opposite index finger via ME or MI (control conditions). Participants then rated the force on the same scale of 1–10. Exp 1: Participants (N = 27) performed the task with tactile stimulation (ME+TAC, MI+TAC) in addition to control conditions. Exp 2: Participants (N = 26) performed the task in dual-task conditions (ME+COG, MI+COG) in addition to control conditions. Results indicate that (Exp 1) tactile stimulation impaired performance in ME but not MI. Dual-task conditions (Exp 2) were not shown to impair performance in either practice modality. Findings suggest that while somatosensory processing is critical for ME, it is not for MI. Overall we indicate a functional equivalence between feedforward/back mechanisms in MI and ME may not exist. |
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| Keywords: | Somatosensory feedback |
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