Remarkable hand grip steadiness in individuals with complete spinal cord injury
Remarkable hand grip steadiness in individuals with complete spinal cord injury
复制标题
脊髓完全损伤患者的握力具有显着的稳定性
DOI：
10.1007/s00221-019-05656-2
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发表时间：
2019
影响因子：
2
通讯作者：
Nakazawa K.
中科院分区：
文献类型：
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作者：
Nakanishi T;Kobayashi H;Obata H;Nakagawa K;Nakazawa K.
尽管脊髓损伤个体的大脑没有发生损伤，但由于来自损伤水平以下的传入信号输入的失传入，感觉运动皮层发生结构和功能重组。据推测，脊髓损伤个体特有的这种大脑重组有助于改善剩余上肢的运动功能。然而，尚未有研究详细探讨损伤水平以上的运动功能。为了澄清这一点，我们设计了一个实验，使用握力稳定任务，这是一种常用的技术，用于评估运动功能，作为运动神经元共同突触输入变异性的指标。慢性完全性脊髓损伤（cSCI）患者14例，下肢残疾患者15例，健康对照12例。我们澄清了cSCI组的力稳定性显著高于对照组，并且运动年限与这种稳定性显著相关。此外，多重分析显示，力稳定性显著预测运动年。这些结果表明，脊髓损伤后的脑重组可以在功能上影响剩余的上肢运动功能。这些发现可能对临床康复领域，如上肢职业康复有一定的指导意义。他们还表明，完全脊髓损伤的人，基于他们增强的力量调节技能，将擅长精细运动任务，如制造业和手工艺品。
Although no damage occurs in the brains of individuals with spinal cord injury, structural and functional reorganization occurs in the sensorimotor cortex because of the deafferentation of afferent signal input from below the injury level. This brain reorganization that is specific to individuals with spinal cord injury is speculated to contribute to the improvement of the motor function of the remaining upper limbs. However, no study has investigated in detail the motor function above the injury level. To clarify this, we designed an experiment using the handgrip force steadiness task, which is a popular technique for evaluating motor function as the index of the variability of common synaptic input to motoneurons. Fourteen complete spinal cord injury (cSCI) individuals in the chronic phase, fifteen individuals with lower limb disabilities, and twelve healthy controls participated in the study. We clarified that the force steadiness in the cSCI group was significantly higher than that in the control groups, and that sports years were significantly correlated with this steadiness. Furthermore, multiple analyses revealed that force steadiness was significantly predicted by sports years. These results suggest that brain reorganization after spinal cord injury can functionally affect the remaining upper limb motor function. These findings may have implications in the clinical rehabilitation field, such as occupational rehabilitation of the upper limbs. They also indicate that individuals with complete spinal cord injury, based on their enhanced force adjustment skills, would excel at fine motor tasks such as manufacturing and handicrafts.