NMES-evoked somatosensory cortical response under ischemic nerve block
10.16289/j.cnki.1002-0837.2024.01.008
- VernacularTitle:缺血性神经阻滞状态下神经肌肉电刺激诱发感觉皮层活动的研究
- Author:
Yun ZHAO
1
;
Guanghui XIE
;
Yanying YAN
;
Haiyan QIN
;
Fengmei GAO
;
Renqiang YANG
;
Hong SUN
;
Shaojie GU
;
Qin JIANG
;
Xiaoying WU
;
Wensheng HOU
Author Information
1. 重庆电子工程职业学院智慧健康学院,重庆 401331
- Keywords:
ischemic nerve block;
neuromuscular electrical stimulation;
muscle spindle;
somatosensory cortex
- From:Space Medicine & Medical Engineering
2024;35(1):42-46
- CountryChina
- Language:Chinese
-
Abstract:
Objective Neuromuscular electrical stimulation(NMES)-evoked kinesthetic information in muscle spindle can be purely extracted from the mixed motor and sensory afferents using Ischemic nerve block(INB).This study aims to investigate the somatosensory cortical response evoked by NMES activating muscle spindle afferents in forearm.Methods All subjects performed four experimental tasks designed according to a 2×2 factors,including one factor of the INB state(without INB and within INB)and the other of the stimulation intensity(above and below motor threshold).During the experiment,we recorded EEG data with 64 channels and then beta event-related desynchronization(Beta ERD)were utilized quantize somatosensory cortical excitability evoked by the tasks.The subjective perception about the sensation and movement of the right hand were evaluated by a psychophysical test after the right wrist was performed by INB.Results INB significantly reduced beta ERD on the contralateral somatosensory cortex evoked by NMES above the motor threshold,and there was significant difference of NMES-evoked beta ERD values on the contralateral somatosensory cortex between above and below motor threshold.Meanwhile,contralateral dominance of NMES-evoked beta ERD on the somatosensory cortex was transferred to ipsilateral hemisphere under INB.Conclusion INB can significantly reduce NMES-evoked somatosensory cortical response above motor threshold and decrease cortical perception on the stimulus intensity,which may be due to INB resulting in rapid functional reorganization of somatosensory cortex.
