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Does the Central Nervous System learn to plan bimanual movements based on its expectation of availability of visual feedback
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.ORCID iD: 0000-0001-9327-6177
University of Michigan.
2012 (English)In: Human Movement Science, ISSN 0167-9457, E-ISSN 1872-7646, Vol. 31, no 6, p. 1409-1424Article in journal (Refereed) Published
Abstract [en]

The correlation between gaze strategy and kinematics of bimanual movements isassessed using repetitive bimanual object transfers as an experimental paradigm. The hypothesis isthat visual demand in such tasks may be a critical bottleneck determining bimanual coordination.Kinematics and eye-movements were compared before and after practice of this repetitive task.New eye-hand coordination strategies emerged with practice. Also, with practice, a systematicprioritization of the left hand movement to be „primary‟ and the right hand movement to be„secondary‟ emerged. This choice implied that the left hand movement kinematics was similar tounimanual left hand movements, whereas the performance of the right hand task was contingent onsuccessful completion of the primary task. This was revealed by „anticipatory adjustments‟ of theright hand kinematics (Right-hand peak velocity ranged from 100%-70% of the left-hand, and thescaling was dependent on task conditions and the corresponding eye-hand coordination strategiesused). We use this evidence to argue that the CNS, aware of an inherent asymmetry between thetwo hand systems, learns to anticipate the need and availability of visual feedback for successfultask completion, and uses this knowledge to optimize movement coordination - specifically suchthat the right-hand control was modulated to take visual constraints into account.

Place, publisher, year, edition, pages
2012. Vol. 31, no 6, p. 1409-1424
Keywords [en]
Eye-hand coordination, repetitive bimanual movements, learning, gaze strategies, visual feedback, left-right asymmetry
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:hig:diva-11545DOI: 10.1016/j.humov.2012.02.011ISI: 000313080500005Scopus ID: 2-s2.0-84870243122OAI: oai:DiVA.org:hig-11545DiVA, id: diva2:505304
Available from: 2012-02-23 Created: 2012-02-23 Last updated: 2018-03-13Bibliographically approved

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Srinivasan, Divya

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