Perception and reproduction of force direction in the horizontal plane.
Perception and reproduction of force direction in the horizontal plane.
复制标题
水平面上力方向的感知和再现。
DOI：
--
复制
发表时间：
2003
影响因子：
2.5
通讯作者：
A. Berthoz
中科院分区：
文献类型：
--
作者：
D. Toffin;J. McIntyre;J. Droulez;A. Kemeny;A. Berthoz
在这项研究中，我们评估了人类感知和复制施加在手上的力的能力。我们测试了在执行这两项任务时的知觉扭曲和/或特权方向。受试者抵抗操纵杆在给定方向上施加的参考力，并指示将手保持在固定位置。在知觉任务中，受试者随后抵抗第二个这样的力，他们可以用电位器调整其方向；任务是重新定位第二个力，使其与参照物的感知方向相同。在复制任务中，受试者被指示用与抵抗最初施加的参考力相同的力来推动现在弹性约束的操纵杆。在水平面上测试了24个参考力方向，每个方向测试了两次。我们在力量方向的复制中观察到系统性的扭曲，这在知觉任务中是不存在的。我们进一步观察到，肢体僵硬的各向异性可以预测扭曲，并且可以通过操纵手-操纵杆相互作用的机械阻抗来影响扭曲。我们的结论是，人类受试者不是根据感知到的力向量来指定和存储手所施加的力，而是根据抵抗或产生力所需的运动活动--即受试者拥有多维的“努力感”。
In this study, we evaluated the capacity of human beings to perceive and reproduce forces applied to the hand. We tested for perceptive distortions and/or privileged directions in the performance of these two tasks. Subjects resisted a reference force applied by a joystick in a given direction, with instructions to keep the hand at a constant position. In a perception task, subjects subsequently resisted a second such force, the direction of which they could adjust with a potentiometer; the task was to reorient the second force to be in the same perceived direction as the reference. In a reproduction task, subjects were instructed to push against the now elastically constrained joystick with the same force that was required to resist the initially applied reference force. Twenty-four reference force directions in the horizontal plane were tested twice each. We observed systematic distortions in the reproduction of force direction that were not present in the perception task. We further observed that the distortions could be predicted by anisotropy of limb stiffness and could be affected by manipulating the mechanical impedance of the hand-joystick interaction. We conclude that human subjects specify and store forces to be applied by the hand not in terms of a perceived force vector, but rather in terms of the motor activity required to resist or produce the force-i.e., subjects possess a multi-dimensional "sense of effort."
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影响因子：
2.5
作者：
SOECHTING, JF;FLANDERS, M
通讯作者：
FLANDERS, M
省力感和单关节运动控制两种模型。
DOI：
10.3109/08990229509093667
发表时间：
1995
期刊：
Somatosensory & motor research.
影响因子：
--
作者：
Burgess,PR;Cooper,TA;Gottlieb,GL;Latash,ML
通讯作者：
Latash,ML
影响因子：
2.5
作者：
SOECHTING, JF;FLANDERS, M
通讯作者：
FLANDERS, M
人类的肌肉力量感和某种感觉传入信息。
影响因子：
2.1
作者：
Sanes,JN;Shadmehr,R
通讯作者：
Shadmehr,R