Neuromuscular recruitment pattern in motor point stimulation
Neuromuscular recruitment pattern in motor point stimulation
复制标题
运动点刺激中的神经肌肉募集模式
DOI：
10.1111/aor.14445
复制
发表时间：
2022
影响因子：
2.4
通讯作者：
Masani Kei
中科院分区：
文献类型：
--
作者：
Nakagawa Kento;Fok Kai Lon;Masani Kei
背景经皮电刺激肌腹运动点，运动点刺激（MPS）广泛用于临床环境，然而，尚不完全了解MPS如何募集运动神经。在这里，我们调查的运动神经和抽搐力的招聘模式在MPS和相比，在周围神经刺激（PNS）的招聘。MethodsTen健康人参加了这项研究。在比目鱼肌上使用MPS，在胫神经上使用PNS，施加从阈下到最大强度的各种刺激强度的单脉冲刺激。我们测量了小腿肌肉的诱发电位和抽搐力。在MPS和PNS之间，我们比较了M波的募集曲线和抽搐力的动力学，例如从力开始到峰值的持续时间（时间到峰值）。结果MPS和PNS在比目鱼肌中的最大M波没有差异，而MPS中的最大M波比PNS中的其他小腿肌肉小得多。这反映了MPS的跖屈肌颤动力比PNS小。此外，MPS组比目鱼肌M波募集曲线斜率小于PNS组。结论与PNS组相比，MPS组能够有效地选择性募集靶肌运动神经，并逐渐增加运动神经的募集。
BackgroundTranscutaneous electrical stimulation on the motor points over muscle belly, i.e., motor point stimulation (MPS), is widely used in clinical settings, however it is not fully understood how MPS recruits motor nerves. Here we investigated the recruitment pattern of the motor nerve and twitch force during MPS and compared to the recruitment during peripheral nerve stimulation (PNS).MethodsTen healthy individuals participated in this study. Using MPS on the soleus muscle and PNS on the tibial nerve, a single pulse stimulation was applied with various stimulation intensities from subthreshold to the maximum intensity. We measured the evoked potentials in the lower leg muscles and twitch force. Between MPS and PNS, we compared the recruitment curves of M‐waves and the dynamics of twitch force such as duration from force onset to peak (time‐to‐peak).ResultsThe maximum M‐wave was not different between MPS and PNS in the soleus muscle, while it was much smaller in MPS than in PNS in the other lower leg muscles. This reflected the smaller twitch force of plantarflexion in MPS than PNS. In addition, the slope of the recruitment curve for the soleus M‐wave was smaller in MPS than PNS.ConclusionTherefore, unlike PNS, MPS can efficiently and selectively recruit motor nerves of the target muscle and gradually increase the recruitment of the motor nerve.