Flanagan J R, Tresilian J R
MRC Applied Psychology Unit, Cambridge, United Kingdom.
J Exp Psychol Hum Percept Perform. 1994 Oct;20(5):944-57. doi: 10.1037//0096-1523.20.5.944.
The authors examined the coupling of grip force and load force during point-to-point and cyclic arm movements while holding an object in a variety of grips, including 1- and 2-handed grips and "inverted" grips. In all grips, grip force is modulated in phase with fluctuations in load force that are induced by the arm movement. The tight temporal coupling between grip force and load force seen when moving an object held in a precision grip (J. R. Flanagan, J. Tresilian, & A. M. Wing, 1993) is observed in other grips. The control of precision grip force during whole-body jumping movements was also investigated. Grip force was modulated in phase with changes in load force induced by jumping even though the arm's joint angles were fixed. The tight temporal coupling between grip force and load force during object transport reflects a general control strategy that is not specific to any particular grip or mode of transport. Models of the coordination of grasp and transport in prehensile behaviors are discussed.
作者研究了在多种握持方式下，包括单手和双手握持以及“反向”握持，在点对点和循环手臂运动过程中握力与负载力的耦合情况。在所有握持方式中，握力会随着手臂运动引起的负载力波动而同步调制。当移动以精确握持方式（J.R.弗拉纳根、J.特雷西利安和A.M.温，1993年）握持的物体时所观察到的握力与负载力之间紧密的时间耦合，在其他握持方式中也能观察到。还研究了全身跳跃运动过程中精确握力的控制。即使手臂关节角度固定，握力也会随着跳跃引起的负载力变化而同步调制。物体运输过程中握力与负载力之间紧密的时间耦合反映了一种通用的控制策略，该策略并非特定于任何特定的握持方式或运输模式。文中讨论了抓握行为中抓握与运输协调的模型。
