Intermuscular co-ordination during fast contact control leg tasks in man
Intermuscular co-ordination during fast contact control leg tasks in man
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人类快速接触控制腿部任务期间的肌间协调
DOI：
10.1016/s0006-8993(96)01327-3
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发表时间：
1997
期刊：
影响因子：
2.9
通讯作者：
G. V. I. Schenau
中科院分区：
文献类型：
--
作者：
C. Doorenbosch;T. G. Welter;G. V. I. Schenau
从以前对人类腿部伸展的反向动力学分析中，假设单关节肌肉和双关节肌肉激活的潜在过程是不同的；单关节肌肉在缩短时被激活，而双关节肌肉似乎负责控制外力方向。在本研究中，实验是在专门为检验这一假设而开发的测力计上进行的。在腿部伸展过程中，受试者必须在移动的力盘上施加不同的规定力矢量，这是他们在实际实验之前进行的密集练习。记录每一次试验的位置、力量和肌电活动。用逆动力学方法计算净关节力矩，并将其与单关节和双关节大腿肌肉的肌电模式相关联，以揭示先前观察到的接触任务中的不同角色是否可能构成运动控制的一般原则。结果表明，虽然双关节股直肌和腿肌在控制外力方向方面的动作是一致的，但单关节肌肉的动作并不符合它们作为简单做功装置的假设。因此，单关节和双关节肌肉的不同对照的概括性不能被证实用于这些任务。它们可能反映了CNS可用于控制不同联系控制任务的更多可用策略中的一种。
From previous inverse dynamic analyses of human leg extensions, it was hypothesized that the underlying processes for the activation of mono- and biarticular muscles are different; the mono-articular muscles being activated when they shortened, whereas the biarticular muscles appeared responsible for the control of the external force direction. In the present study, experiments were performed on a dynamometer which was especially developed to test this hypothesis. Subjects had to exert different prescribed force vectors on a moving force-plate during leg extension, which they had intensively practised prior to the actual experiments. Of each trial, position, force and EMG activity were recorded. Net joint torques were calculated by the method of inverse dynamics and related to the EMG-patterns of the mono- and biarticular upper leg muscles to reveal whether the previously observed different roles in contact tasks might constitute a general principle in motor control. The results showed that although the action of the biarticular m. rectus femoris and hamstrings muscles was consistent in controlling the direction of the external force, the actions of the mono-articular muscles did not agree with their hypothesized role as simple work generators. The generalizability of a different control for mono-and biarticular muscles could thus not be confirmed for these tasks. They might rather reflect one out of more available strategies the CNS can use to control different contact control tasks.
爪子抖动反应期间膝盖和脚踝处的惯性和肌肉力矩的对比作用。
影响因子：
2.5
作者：
Hoy,MG;Zernicke,RF;Smith,JL
通讯作者：
Smith,JL
向后四足行走的自适应控制。
影响因子：
2.5
作者：
Perell,KL;Gregor,RJ;Buford,JA;Smith,JL
通讯作者：
Smith,JL