Influence of motor imagery on spinal reflex excitability of multiple muscles
Influence of motor imagery on spinal reflex excitability of multiple muscles
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DOI：
10.1016/j.neulet.2018.01.015
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发表时间：
2018-03-06
影响因子：
2.5
通讯作者：
Nakazawa, Kimitaka
中科院分区：
文献类型：
--
作者：
Nakagawa, Kento;Masugi, Yohei;Nakazawa, Kimitaka
运动想象对H反射等脊椎反射的影响尚不清楚。其中一个原因是，可用于记录脊髓反射的肌肉仅限于传统的诱发方法，经皮脊髓刺激已被用于从多个肌肉诱导脊髓反射，我们的目的是研究运动想象对来自多个肌肉的脊髓反射的影响。在右腕伸展和踝屈最大等长收缩的运动表象中，记录下经皮脊髓刺激诱发的6块肢体肌肉的脊髓反射。在这两种想象任务中，在脚踝同侧的足底屈肌和背屈肌中检测到了脊髓反射的易化，而在大腿、脚趾或对侧下肢肌中没有检测到。这些结果表明，等长收缩的运动表象促进了同侧小腿肌肉的脊髓反射兴奋性，但这种易化并不对应于想象中的受累肌肉。
The effects of motor imagery on spinal reflexes such as the H-reflex are unclear. One reason for this is that the muscles that can be used to record spinal reflexes are limited to traditional evoking methods Recently, trans cutaneous spinal cord stimulation has been used for inducing spinal reflexes from multiple muscles and we aimed to examine the effect of motor imagery on spinal reflexes from multiple muscles. Spinal reflexes evoked by transcutaneous spinal cord stimulation were recorded from six muscles from lower limbs during motor imagery of right wrist extension and ankle plantarflexion with maximum isometric contraction. During both imaginary tasks, facilitation of spinal reflexes was detected in the ankle ipsilateral plantarflexor and dorsiflexor muscles, but not in thigh, toe or contralateral lower limb muscles. These results suggest that motor imagery of isometric contraction facilitates spinal reflex excitability in muscles of the ipsilateral lower leg and the facilitation does not correspond to the imaginary involved muscles.