Focal Vibration Alters Human Digital Sensory Nerve Action Potentials: A Pilot Study.

IF 3.1 4区医学 Q2 Medicine Neural Plasticity Pub Date : 2021-03-03 eCollection Date: 2021-01-01 DOI:10.1155/2021/8819169

Dong Qing Zhu, Fang Liu, Yu Zhu, Duan Lei, Xiang Jin, Lan Xu, Chao Jun Zheng, Robert Weber, Xiang Jun Chen

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Abstract

Introduction: We studied the impact of vibratory stimulation on the electrophysiological features of digital sensory nerve action potential (SNAP).

Methods: The antidromic digit 3 SNAP was recorded in 19 healthy adults before, during, and after applying a vibration to either 3rd or 5th metacarpal phalangeal joint (MCPJ) at 60 Hz and amplitude of 2 mm. 100% supramaximal stimulus intensity was performed in 5 subjects (randomly selected from the 19 subjects) where the SNAP sizes were recorded.

Results: The amplitude of digit 3 SNAP declined to 58.9 ± 8.6% when a vibration was applied to MCPJ digit 3. These impacts did not change by increasing the electrical stimulus intensity. The SNAP regained its baseline value immediately after the cessation of vibration stimulation. The magnitude of size reduction of digit 3 SNAP was less when vibration was moved to from MCPJ of digit 3 to MCPJ of digit 5. Discussion. The marked drop of the SNAP size during vibratory stimulation reflects the decreased responsiveness of Aβ afferents to electrical stimulation, which deserve further investigation in the study of focal vibration in neurorehabilitation.

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焦点振动改变人类数字感觉神经动作电位:一项初步研究。

前言:研究了振动刺激对数字感觉神经动作电位(SNAP)电生理特征的影响。方法:对19例健康成人第3或第5掌指关节(MCPJ)施加60 Hz振幅2 mm的振动前、中、后，分别记录3指关节反位SNAP。对5名受试者(从19名受试者中随机选择)进行100%超极大刺激强度，并记录SNAP大小。结果:对MCPJ 3号指施加振动时，3号指SNAP振幅下降58.9±8.6%。这些影响不会随着电刺激强度的增加而改变。在停止振动刺激后，SNAP立即恢复到基线值。当振动从3号手指的MCPJ移动到5号手指的MCPJ时，3号手指SNAP的尺寸减小幅度较小。讨论。振动刺激时SNAP大小的明显下降反映了Aβ传入神经对电刺激的反应性下降，值得在神经康复局灶振动研究中进一步研究。

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来源期刊

Neural Plasticity Neuroscience-Neurology

CiteScore

5.70

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Neural Plasticity is an international, interdisciplinary journal dedicated to the publication of articles related to all aspects of neural plasticity, with special emphasis on its functional significance as reflected in behavior and in psychopathology. Neural Plasticity publishes research and review articles from the entire range of relevant disciplines, including basic neuroscience, behavioral neuroscience, cognitive neuroscience, biological psychology, and biological psychiatry.