为研究高精度经颅直流电刺激(high-definition transcranial direct current stimulation,HD-tDCS)对人体前臂指屈肌的抗疲劳效果,以19名健康男性为研究对象,观察在其运动对侧大脑半球运动皮质区实施HD-tDCS后,右侧前臂指屈肌进行35％最大强度的静力性等长收缩时的抗疲劳效果.结果表明,HD-tDCS组受试者前臂指屈肌抗疲劳时间显著长于基线(Baseline)组和假刺激(Sham)组(P＜0.05);Baseline组和Sham组受试者运动疲劳后报告的主观体力感觉等级水平显著高于HD-tDCS组(P＜0.05);HD-tDCS组受试者在执行疲劳运动任务过程中,其前臂指屈肌表面肌电(surface electromyography,sEMG)信号的幅值水平低于Baseline组和Sham组受试者.证明在健康受试者的运动对侧大脑半球运动皮质区实施HD-tDCS后,能够有效延长其前臂指屈肌抗疲劳时间,同时能够显著减低运动时的疲劳感知程度.
Study on anti-fatigue effect of high-definition transcranial direct current stimulation on forearm muscles of upper limbs
This study aimed to investigate the anti-fatigue effect of high-definition transcranial direct current stimulation(HD-tDCS)on human forearm flexor finger muscle,in order to provide reference for the clinical application of HD-tDCS.In this study,19 healthy male subjects were recruited to observe the anti-fatigue effect of HD-tDCS on the contralateral hemisphere motor cortex on the muscle of the right forearm flexor finger muscle during the fatigue induced by 35％maximal isokinetic voluntary contractions.Subjects were divided into Baseline,HD-tDCS,and Sham groups.Surface electromyographic(sEMG)signals were collected during the performance exercise task and rating of perceived exertion(RPE)was asked after task.The fatigue time of forearm flexors in HD-tDCS group was significantly longer than Baseline and Sham groups(P＜0.05).The level of RPE reported after exercise in Baseline and Sham groups was significantly higher than that in the HD-tDCS group(P＜0.05).The sEMG level of forearm digital flexor in HD-tDCS group was lower than that in Baseline and Sham groups during isometric contraction.Applying HD-tDCS on the primary motor cortex of the contralateral hemisphere motor cortex can effectively prolong the fatigue resistance time and reduce the fatigue perception of the flexor fingers of the forearm,suggesting that HD-tDCS can improve the muscle fatigue resistance and reduce the subjective fatigue feeling to a certain extent.
high-definition transcranial direct current stimulationforearm musclesrating of perceived exertionfatigue time
NETL
NSTL
万方数据
