FRAMES OF REFERENCE FOR HAND ORIENTATION
FRAMES OF REFERENCE FOR HAND ORIENTATION
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DOI：
10.1162/jocn.1995.7.2.182
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发表时间：
1995-03-01
影响因子：
3.2
通讯作者：
SOECHTING, JF
中科院分区：
文献类型：
--
作者：
FLANDERS, M;SOECHTING, JF
在到达和抓握运动中，关于对象位置和对象取向的信息用于指定适当的近端臂姿势以及手腕和手指的适当位置。由于物体定向是在一个固定在空间中的参考系中理想地定义的，因此本研究测试了手部定向的神经控制是否也最好描述为在这个空间参考系中。随着近端臂处于各种姿势，人类受试者使用手杆来近似口头定义的空间方向。受试者在表示空间垂直和空间水平方面做得很好，但在估计45度空间倾斜时出现一致性错误。这些错误与近端手臂姿势的方式表明，倾斜的手的方向可能被指定为一个固定在空间中的参考框架和参考框架之间的妥协固定到arm.In另一个实验中，受试者被明确要求使用固定到手臂的参考框架，性能始终偏向于空间参考框架。结果表明，达到和把握动作地图实施作为两个参照系的汞合金，神经和行为。
In reaching and grasping movements, information about object location and object orientation is used to specify the appropriate proximal arm posture and the appropriate positions for the wrist and fingers. Since object orientation is ideally defined in a frame of reference fixed in space, this study tested whether the neural control of hand orientation is also best described as being in this spatial reference frame. With the proximal arm in various postures, human subjects used a hand-herd rod to approximate verbally defined spatial orientations. Subjects did quite well at indicating spatial vertical and spatial horizontal but made consistent errors in estimating 45 degrees spatial slants. The errors were related to the proximal arm posture in a way that indicated that oblique hand orientations may be specified as a compromise between a reference frame fixed in space and a reference frame fixed to the arm. In another experiment, where subjects were explicitly requested to use a reference frame fixed to the arm, the performance was consistently biased toward a spatial reference frame. The results suggest that reaching and grasping movements map be implemented as an amalgam of two frames of reference, both neurally and behaviorally.