PDF(Pubmed)
Abstract：
The present study was designed to examine the effect of trans-spinal magnetic stimulation on bilateral respiratory and forelimb muscles in healthy subjects. Two wings of a figure-of-eight magnetic coil were placed on the dorsal vertebrae, from the fifth cervical to the second thoracic dorsal vertebra with a center at the seventh cervical vertebra. The surface electromyograms of bilateral diaphragm and biceps were recorded in response to trans-spinal magnetic stimulation with 20%-100% maximum output of the stimulatory device in male (n = 12) and female participants (n = 8). Trans-spinal magnetic stimulation can induce a co-activation of bilateral diaphragm and biceps when the stimulation intensity is above 60%. The onset latency was comparable between the left and right sides of the muscles, suggesting bilateral muscles could be simultaneously activated by trans-spinal magnetic stimulation. In addition, the intensity-response curve of the biceps was shifted upward compared with that of the diaphragm in males, indicating that the responsiveness of the biceps was greater than that of the diaphragm. This study demonstrated the feasibility of utilizing trans-spinal magnetic stimulation to co-activate the bilateral diaphragm and biceps. We proposed that this stimulatory configuration can be an efficient approach to activate both respiratory and forelimb muscles.
摘要：
本研究旨在检查经脊髓磁刺激对健康受试者双侧呼吸和前肢肌肉的影响。将八字磁性线圈的两个翅膀放在背侧椎骨上，从第五颈椎到第二胸椎，中心在第七颈椎。在男性（n=12）和女性（n=8）中，记录双侧diaphragm肌和二头肌的表面肌电图，以刺激装置的20％-100％的最大输出。当刺激强度超过60％时，经脊髓磁刺激可以诱导双侧diaphragm和二头肌的共激活。左侧和右侧肌肉的发作潜伏期相当，提示双侧肌肉可以通过经脊髓磁刺激同时激活。此外,与男性的the肌相比，二头肌的强度-反应曲线向上移动，表明肱二头肌的反应性大于膈肌的反应性。这项研究证明了利用经脊髓磁刺激共同激活双侧diaphragm肌和二头肌的可行性。我们提出这种刺激配置可以是激活呼吸和前肢肌肉的有效方法。
