Adaptation to delayed force perturbations in reaching movements.
Adaptation to delayed force perturbations in reaching movements.
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DOI：
10.1371/journal.pone.0012128
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发表时间：
2010-08-11
期刊：
影响因子：
3.7
通讯作者：
Karniel A
中科院分区：
文献类型：
--
作者：
Levy N;Pressman A;Mussa-Ivaldi FA;Karniel A
在过去的几十年里，人们对伸展运动中确定性的力扰动的适应性进行了广泛的研究。在这里，我们使用这种方法来探索大脑适应延迟速度依赖的力场的能力。两组受试者在速度相关力场下进行了达标实验。力要么与当前速度成正比(控制)，要么滞后50ms(测试)。结果表明，对滞后力摄动有明显的适应性。与适应到非延迟速度依赖场(控制)的后适应相比，在渔获物试验期间偏离直线的偏差在时间上移动，表明对延迟力场的期望。对力场的适应被认为是一个过程，在这个过程中，运动系统根据肢体对运动指令的反应状态来预测预期的力。这项研究首次证明，这种预测的时间窗口不需要固定。这与自适应机制补偿感觉-运动系统中信息传输的可变性的能力有关。
Adaptation to deterministic force perturbations during reaching movements was extensively studied in the last few decades. Here, we use this methodology to explore the ability of the brain to adapt to a delayed velocity-dependent force field. Two groups of subjects preformed a standard reaching experiment under a velocity dependent force field. The force was either immediately proportional to the current velocity (Control) or lagged it by 50 ms (Test). The results demonstrate clear adaptation to the delayed force perturbations. Deviations from a straight line during catch trials were shifted in time compared to post-adaptation to a non-delayed velocity dependent field (Control), indicating expectation to the delayed force field. Adaptation to force fields is considered to be a process in which the motor system predicts the forces to be expected based on the state that a limb will assume in response to motor commands. This study demonstrates for the first time that the temporal window of this prediction needs not to be fixed. This is relevant to the ability of the adaptive mechanisms to compensate for variability in the transmission of information across the sensory-motor system.
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DOI：
10.1109/5326.827449
发表时间：
2000-02-01
期刊：
IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART C-APPLICATIONS AND REVIEWS
影响因子：
--
作者：
Karniel, A;Inbar, GF
通讯作者：
Inbar, GF
影响因子：
2
作者：
Gribble, PL;Ostry, DJ
通讯作者：
Ostry, DJ
影响因子：
2
作者：
Foulkes, AJM;Miall, RC
通讯作者：
Miall, RC
影响因子：
9.2
作者：
Pressman, Assaf;Welty, Leah J.;Mussa-Ivaldi, Ferdinando A.
通讯作者：
Mussa-Ivaldi, Ferdinando A.
影响因子：
64.8
作者：
Thoroughman, KA;Shadmehr, R
通讯作者：
Shadmehr, R