Investigation on effectiveness of EMG for G-induced loss of consciousness forewarning under centrifuge G load
10.19745/j.1003-8868.2024231
- VernacularTitle:离心机G载荷作用下肌电变化对G-LOC预警的有效性研究
- Author:
Yi-feng LI
1
;
Jing-hui YANG
1
;
Bao-hui LI
1
;
Zhao JIN
1
;
Li-hui ZHANG
1
;
Xiao-yang WEI
1
;
Ming-hao YANG
1
Author Information
1. 空军军医大学空军特色医学中心,北京 100142
- Publication Type:Journal Article
- Keywords:
centrifuge;
G-load effect;
G-induced loss of consciousness;
forewarning of G-induced loss of consciousness;
2-condition analysis method
- From:
Chinese Medical Equipment Journal
2024;45(12):25-31
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the efficiency and feasibility of EMG changes for forewarning of G-induced loss of consciou-sness(G-LOC)under G load of human centrifuge.Methods Firstly,seven subjects were selected for high G training and push-pull training with reference to the 2-condition analysis method.Secondly,the characteristics of EMG changes in different parts of the body were analyzed before and after the occurrence of G-LOC in the subjects under the high-G training mode and the push-pull effect.Finally,the changes of two EMG characteristic parameters,including integrated absolute value(IAV)and waveform length(WL),were investigated under two sequential loads to one subject.Results The EMG waveforms of all the subjects were asymmetric and irregular before and after G-LOC.Under the high-G training mode,the changes of EMG characteristic parameters at the gastrocnemius muscle were more valuable than those at the tibialis anterior muscle for G-LOC forewarning;under the push-pull effect,the changes of EMG characteristic parameters were not obvious,and not effective for G-LOC forewarning.The IAV and WL showed characteristic changes under two sequential loads to one subject.Conclusion The changes of EMG characteristic parameters at the gastrocnemius muscle behaved better than those at the tibialis anterior muscle for G-LOC forewarning;the 2-condition analysis method was effective for G-LOC forewarning under the high-G training mode,while not in the presence of a push-pull effect;comparing the changes of EMG characteristic para-meters of some subject under two sequential loads can also be used for G-LOC forewarning.[Chinese Medical Equipment Journal,2024,45(12):25-31]
