caa a22 4500 445352000 CHVBK 20180317142847.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00221-011-2784-y doi (NATIONALLICENCE)springer-10.1007/s00221-011-2784-y Grip forces during object manipulation: experiment, mathematical model, and validation [Elektronische Daten] [Gregory Slota, Mark Latash, Vladimir Zatsiorsky] When people transport handheld objects, they change the grip force with the object movement. Circular movement patterns were tested within three planes at two different rates (1.0, 1.5Hz) and two diameters (20, 40cm). Subjects performed the task reasonably well, matching frequencies and dynamic ranges of accelerations within expectations. A mathematical model was designed to predict the applied normal forces from kinematic data. The model is based on two hypotheses: (a) the grip force changes during movements along complex trajectories can be represented as the sum of effects of two basic commands associated with the parallel and orthogonal manipulation, respectively; (b) different central commands are sent to the thumb and virtual finger (Vf—four fingers combined). The model predicted the actual normal forces with a total variance accounted for of better than 98%. The effects of the two components of acceleration—along the normal axis and the resultant acceleration within the shear plane—on the digit normal forces are additive. Springer-Verlag, 2011 Grasping nationallicence Manipulation nationallicence Motor control nationallicence Modeling nationallicence Slota Gregory Pennsylvania State University, 39 Recreation Building, 16802, University Park, PA, USA aut Latash Mark Pennsylvania State University, 268N Recreation Building, 16802, University Park, PA, USA aut Zatsiorsky Vladimir Pennsylvania State University, 39 Recreation Building, 16802, University Park, PA, USA aut Experimental Brain Research Springer-Verlag 213/1(2011-08-01), 125-139 0014-4819 213:1<125 2011 213 221 https://doi.org/10.1007/s00221-011-2784-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2784-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Slota Gregory Pennsylvania State University, 39 Recreation Building, 16802, University Park, PA, USA aut NATIONALLICENCE 700 1- Latash Mark Pennsylvania State University, 268N Recreation Building, 16802, University Park, PA, USA aut NATIONALLICENCE 700 1- Zatsiorsky Vladimir Pennsylvania State University, 39 Recreation Building, 16802, University Park, PA, USA aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 213/1(2011-08-01), 125-139 0014-4819 213:1<125 2011 213 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer