TY - JOUR
T1 - Comparison of the activities of the deep trunk muscles measured using intramuscular and surface electromyography
AU - Okubo, Yu
AU - Kaneoka, Koji
AU - Imai, Atsushi
AU - Shiina, Itsuo
AU - Tatsumura, Masaki
AU - Izumi, Shigeki
AU - Miyakawa, Shumpei
N1 - Funding Information:
This study was supported by a Grant-in-Aid for Scientific Research (B) from the Japan Society for the Promotion of Science (grant number, 19300220). We would like to acknowledge the contribution of Fuminari Kaneko for providing the guidelines on the use of intramuscular electrodes.
PY - 2010/12
Y1 - 2010/12
N2 - Surface electromyography (EMG) has been used to estimate deep trunk muscle activity. However, it remains unknown whether surface EMG provides an accurate estimation of this activity. The purposes of this study were to compare surface and intramuscular EMG activity measurements and investigate the efficacy of surface EMG measurement for the transversus abdominis (TrA) and the multifidus (MF) muscles. Eight healthy men participated in the study. TrA and MF activities were simultaneously measured by both intramuscular and surface EMG during isometric trunk exercises. Spearman correlation coefficients for the relationship between the two activity measurements for the right TrA, left TrA, right MF, and left MF were 0.55, 0.36, 0.67, and 0.79, respectively. For the TrA, BlandAltman plots revealed that mean differences between measurements obtained by intramuscular EMG and surface EMG were not close to zero, with a systematic bias toward higher surface EMG values. In conclusion, surface and intramuscular EMG activity measurements were strongly correlated for MF muscles, but poorly correlated for TrA muscles.
AB - Surface electromyography (EMG) has been used to estimate deep trunk muscle activity. However, it remains unknown whether surface EMG provides an accurate estimation of this activity. The purposes of this study were to compare surface and intramuscular EMG activity measurements and investigate the efficacy of surface EMG measurement for the transversus abdominis (TrA) and the multifidus (MF) muscles. Eight healthy men participated in the study. TrA and MF activities were simultaneously measured by both intramuscular and surface EMG during isometric trunk exercises. Spearman correlation coefficients for the relationship between the two activity measurements for the right TrA, left TrA, right MF, and left MF were 0.55, 0.36, 0.67, and 0.79, respectively. For the TrA, BlandAltman plots revealed that mean differences between measurements obtained by intramuscular EMG and surface EMG were not close to zero, with a systematic bias toward higher surface EMG values. In conclusion, surface and intramuscular EMG activity measurements were strongly correlated for MF muscles, but poorly correlated for TrA muscles.
KW - Deep trunk muscles
KW - electromyography
KW - validation
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U2 - 10.1142/S0219519410003599
DO - 10.1142/S0219519410003599
M3 - Article
AN - SCOPUS:79952596202
SN - 0219-5194
VL - 10
SP - 611
EP - 620
JO - Journal of Mechanics in Medicine and Biology
JF - Journal of Mechanics in Medicine and Biology
IS - 4
ER -