Imamizu H, Uno Y, Kawato M
Advanced Telecommunications Research Human Information Processing Research Laboratories, Kyoto, Japan.
J Exp Psychol Hum Percept Perform. 1998 Jun;24(3):812-29. doi: 10.1037//0096-1523.24.3.812.
The elbow-joint angle and the shoulder-joint angle of participants aiming at targets were multiplied in an experiment that used a position-recording system and a cathode-ray tube screen. The linear transformation in joint angles (intrinsic coordinates) corresponded to a nonlinear transformation between the hand coordinates and the screen coordinates (extrinsic coordinates). We examined whether participants could learn this transformation in the intrinsic coordinates or in the extrinsic coordinates by investigating intermanual (between-hands) transfer under an intrinsically consistent condition and an extrinsically consistent condition. Positive intermanual transfer was observed in the former condition but not in the latter condition. Results suggest that participants can learn the linear transformation in joint angles under the intrinsic coordinates and that the central nervous system adaptively represents the intrinsic kinematics.
在一项使用位置记录系统和阴极射线管屏幕的实验中，对瞄准目标的参与者的肘关节角度和肩关节角度进行了相乘处理。关节角度（内在坐标）的线性变换对应于手部坐标与屏幕坐标（外在坐标）之间的非线性变换。我们通过研究在内在一致条件和外在一致条件下的双手间（双手之间）转移，来考察参与者是能够在内在坐标还是外在坐标中学习这种变换。在前一种条件下观察到了正向的双手间转移，而在后一种条件下则未观察到。结果表明，参与者能够在内在坐标下学习关节角度的线性变换，并且中枢神经系统适应性地呈现内在运动学。
