SENSORIMOTOR REPRESENTATIONS FOR POINTING TO TARGETS IN 3-DIMENSIONAL SPACE
SENSORIMOTOR REPRESENTATIONS FOR POINTING TO TARGETS IN 3-DIMENSIONAL SPACE
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DOI：
10.1152/jn.1989.62.2.582
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发表时间：
1989-08-01
影响因子：
2.5
通讯作者：
FLANDERS, M
中科院分区：
文献类型：
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作者：
SOECHTING, JF;FLANDERS, M
1.在各种实验条件下，对受试者在个人以外的空间中指向目标的准确性进行了评估。2.当受试者在黑暗中指向记忆中的目标位置时，他们犯了很大的错误。从肩膀到目标的距离误差有时高达15厘米。同样从肩部测量的方向误差较小。3.对受试者手指位置传递的关于目标位置的信息的分析表明，关于目标距离的信息始终低于关于其方向的信息。4.当受试者将手臂放在视野中，并在灯光下指向记忆中的目标位置时，距离误差仍然存在。5.当受试者使用指针指向目标时，或者当他们被要求在被动移动到目标后重现手指的位置时，错误要小得多。6.从这些研究结果中，我们得出结论，受试者有一个合理准确的视觉表示的目标位置，并能够有效地使用动觉派生的信息的目标位置。因此，我们认为，错误的指向结果从错误的感觉运动的转换，从视觉表示的目标位置的手臂运动的运动学表示。
1. The accuracy with which subjects pointed to targets in extrapersonal space was assessed under a variety of experimental conditions. 2. When subjects pointed in the dark to remembered target locations, they made substantial errors. Errors in distance, measured from the shoulder to the target, were sometimes as much as 15 cm. Errors in direction, also measured from the shoulder, were smaller. 3. An analysis of the information transmitted by the location of the subject's finger about the location of the target showed that the information about the target's distance was consistently lower than the information about its direction. 4. The errors in distance persisted when subjects had their arm in view and pointed in the light to remembered target locations. 5. The errors were much smaller when subjects used a pointer to point to the target or when they were asked to reproduce the position of their finger after it had been passively moved to the target. 6. From these findings we conclude that subjects have a reasonably accurate visual representation of target location and are able to effectively use kinesthetically derived information about target location. We therefore suggest that errors in pointing result from errors in the sensorimotor transformation from the visual representation of the target location to the kinematic representation of the arm movement.