Quantization of continuous arm movements in humans with brain injury
Quantization of continuous arm movements in humans with brain injury
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DOI：
10.1073/pnas.96.8.4645
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发表时间：
1999-04-13
影响因子：
11.1
通讯作者：
Hogan, N
中科院分区：
文献类型：
--
作者：
Krebs, HI;Aisen, ML;Hogan, N
世纪以来，人类运动研究者一直在报道明显连续运动的分段，但原始子运动的存在从未被证明。在20例从单一脑血管意外（中风）中恢复的患者中，我们确定了在无负荷任务中组成连续手臂运动的明显子运动。运动学分析表明，在不同脑损伤的患者中，亚运动速度曲线是不变的，并提供了原始亚运动的详细形状的实验验证。亚运动形状不受其峰值速度的影响，为了进一步测试形状与速度的不变性，我们分析了肌阵挛患者的运动行为。这名患者偶尔会做出非自主的电击样手臂运动，这发生在神经肌肉系统的最大容量附近，表现出与中风患者中确定的速度曲线相当的速度曲线，并且也与速度无关。
Segmentation of apparently continuous movement has been reported for over a century by human movement researchers, but the existence of primitive submovements has never been proved. In 20 patients recovering from a single cerebral vascular accident (stroke), we identified the apparent submovements that composed a continuous arm motion in an unloaded task. Kinematic analysis demonstrated a submovement speed profile that was invariant across patients with different brain lesions and provided experimental verification of the detailed shape of primitive submovements, The submovement shape was unaffected by its peak speed, and to test further the invariance of shape with speed, we analyzed movement behavior in a patient with myoclonus. This patient occasionally made involuntary shock-like arm movements, which occurred near the maximum capacity of the neuromuscular system, exhibited speed profiles that were comparable to those identified in stroke patients, and were also independent of speed.