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ERIC Number: EJ932358
Record Type: Journal
Publication Date: 2010-Dec
Pages: 9
Abstractor: As Provided
Reference Count: 64
ISBN: N/A
ISSN: ISSN-0096-1523
Motor Prediction at the Edge of Instability: Alteration of Grip Force Control during Changes in Bimanual Coordination
Danion, Frederic; Jirsa, Viktor K.
Journal of Experimental Psychology: Human Perception and Performance, v36 n6 p1684-1692 Dec 2010
Predicting the consequences of actions is fundamental for skilled motor behavior. We investigated whether motor prediction is influenced by the fact that some movements are easier to perform and stabilize than others. Twelve subjects performed a bimanual rhythmical task either symmetrically or asymmetrically (the latter being more difficult and less stable) while oscillating in each hand an object attached to an elastic cord. Motor prediction was monitored through the adequacy of anticipatory grip force adjustments with respect to the elastic resisting force. Results showed less adequate predictive control during asymmetrical movements (compared with symmetrical ones). Furthermore, switching between modes of coordination induced even larger alterations. An interesting finding was that grip force control did not always stabilize around the expected value after voluntary transition. We conclude that motor prediction is affected by the degree of coordination between the upper limbs and by phase transitions and is prone to carryover effects. (Contains 1 footnote and 4 figures.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A