Neuromuscular-skeletal constraints upon the dynamics of perception-action coupling
Neuromuscular-skeletal constraints upon the dynamics of perception-action coupling
复制标题
神经肌肉骨骼对知觉-动作耦合动力学的约束
DOI：
10.1007/bf00241379
复制
发表时间：
2004
影响因子：
2
通讯作者：
R. Carson
中科院分区：
文献类型：
--
作者：
R. Carson
四名惯用右手的受试者随着听觉节拍器及时进行食指的有节奏的弯曲和伸展运动。在每组试验中，反应手的前臂均置于俯卧、中立或仰卧位置。在节拍上弯曲的情况下，指导受试者在节拍器的每次节拍下协调手指弯曲方向的最大偏移。在节拍延伸条件下，受试者被指示协调节拍器每次节拍在手指延伸方向上的最大偏移。节拍器的频率从 1.75 Hz 增加到 3.50 Hz，分 0.25 Hz 的八个步长（8 秒稳定期）。在以随拍延伸模式准备的试验期间，经常发生突然转变为随拍伸缩模式或相位漂移，特别是在较高的起搏频率下。与此形成鲜明对比的是，在以弯曲节拍模式准备的试验中，这种转变从未出现。当前臂处于俯卧或中立位置时，这些转变的频率和敏捷性都比前臂处于仰卧位置时更大。这些结果是参考神经肌肉骨骼系统的内在特性对协调动力学施加的约束进行讨论的。
Four right-handed subjects performed rhythmic flexion and extension movements of the index finger in time with an auditory metronome. On each block of trials the forearm of the response hand was placed in a prone, neutral or supine position. In the flex-on-the-beat condition, subjects were instructed to coordinate maximum excursion in the direction of finger flexion with each beat of the metronome. In the extend-on-the-beat condition, subjects were instructed to coordinate maximum excursion in the direction of finger extension with each beat of the metronome. The frequency of the metronome was increased from 1.75 Hz to 3.50 Hz in eight steps (8-s plateaus) of 0.25 Hz. During trials prepared in the extend-on-the-beat pattern, abrupt transitions to either a flex-on-the-beat pattern or to phase wandering often occurred, particularly at higher pacing frequencies. In marked constrast, during trials prepared in the flexon-the-beat pattern such transitions were never present. Both the frequency and the alacrity of these transitions were greater when the forearm was in a prone or neutral position than when the forearm was in a supine position. These results are discussed with reference to the constraints imposed on the coordination dynamics by the intrinsic properties of the neuromuscular-skeletal system.
登录
查看更多内容
皮质脊髓和红核脊髓控制肢体运动的神经机制。
影响因子：
--
作者：
Cheney,PD;Fetz,EE;Mewes,K
通讯作者：
Mewes,K
影响因子：
2.4
作者：
MURRAY, WM;DELP, SL;BUCHANAN, TS
通讯作者：
BUCHANAN, TS
影响因子：
56.9
作者：
SCHONER, G;KELSO, JAS
通讯作者：
KELSO, JAS
语言和运动功能的常见皮质和丘脑机制。
DOI：
10.1152/ajpregu.1984.246.6.r901
发表时间：
1984
期刊：
The American journal of physiology
影响因子：
--
作者：
Ojemann,GA
通讯作者：
Ojemann,GA