caa a22 4500 445353848 CHVBK 20180317142853.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00221-011-2760-6 doi (NATIONALLICENCE)springer-10.1007/s00221-011-2760-6 Visual information gain and task asymmetry interact in bimanual force coordination and control [Elektronische Daten] [Xiaogang Hu, Karl Newell] This study examined the question of whether and how the influence of visual information on force coordination patterns is dependent on the settings of a task asymmetry constraint. In a bimanual isometric force experiment, the task asymmetry was manipulated via imposing different coefficients on the index finger forces such that the weighted sum of the finger forces matched the target force. The environmental constraint was quantified by the visual performance error and was manipulated through the change of visual gain (number of pixels on the screen representing the unit of force). The constraint arising from the individual was quantified by the bilateral coupling effect (i.e., symmetric force production) between hands. The results revealed improved performance in terms of lower variability and performance error and more complex total force structure with higher visual gain. The influence of visual gain on the force coordination pattern, however, was found to be dependent on the task coefficients imposed on the finger forces. Namely, the force sharing between hands became more symmetric with high visual gain only when the right finger force had the higher coefficient, and an error-compensatory strategy was evident with high gain only when symmetric coefficients were imposed on the two fingers. The findings support the proposition that the motor coordination and control patterns are organized by the interactive influence of different categories of constraints where the functional influence of the information provided is dependent on the motor output. Springer-Verlag, 2011 Visual gain nationallicence Constraints nationallicence Constraints interaction nationallicence Bimanual coupling nationallicence Isometric force nationallicence Hu Xiaogang Department of Kinesiology, The Pennsylvania State University, 266 Rec Building, 16802, University Park, PA, USA aut Newell Karl Department of Kinesiology, The Pennsylvania State University, 266 Rec Building, 16802, University Park, PA, USA aut Experimental Brain Research Springer-Verlag 212/4(2011-08-01), 497-504 0014-4819 212:4<497 2011 212 221 https://doi.org/10.1007/s00221-011-2760-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2760-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hu Xiaogang Department of Kinesiology, The Pennsylvania State University, 266 Rec Building, 16802, University Park, PA, USA aut NATIONALLICENCE 700 1- Newell Karl Department of Kinesiology, The Pennsylvania State University, 266 Rec Building, 16802, University Park, PA, USA aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 212/4(2011-08-01), 497-504 0014-4819 212:4<497 2011 212 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer