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Validity of surface electromyography for vastus intermedius muscle assessed by needle electromyography.
J Neurosci Methods. 2011 Jun 15; 198(2):332-5.JN

Abstract

Recently, a new recording technique for surface electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (~30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r=0.897-0.984, p<0.001). No significant difference was observed between correlation coefficient of surface EMG detected at the distal versus needle EMG detected at the middle and that of surface EMG detected at distal versus needle EMG detected at distal (p<0.05). These results suggest that surface EMG at the distal portion of the VI muscle, which is the only region available for surface EMG, can be used to evaluate global neuromuscular activation of the VI muscle during isometric contraction at a low force level.

Authors+Show Affiliations

Laboratory of Applied Physiology, Graduate School of Human and Environmental Studies, Kyoto University, Yosidanihonmatsucho, Sakyo, Kyoto, Kyoto 6068501, Japan. watanabe.kohei@aw7.ecs.kyoto-u.ac.jpNo affiliation info available

Pub Type(s)

Journal Article
Validation Study

Language

eng

PubMed ID

21463655

Citation

Watanabe, Kohei, and Hiroshi Akima. "Validity of Surface Electromyography for Vastus Intermedius Muscle Assessed By Needle Electromyography." Journal of Neuroscience Methods, vol. 198, no. 2, 2011, pp. 332-5.
Watanabe K, Akima H. Validity of surface electromyography for vastus intermedius muscle assessed by needle electromyography. J Neurosci Methods. 2011;198(2):332-5.
Watanabe, K., & Akima, H. (2011). Validity of surface electromyography for vastus intermedius muscle assessed by needle electromyography. Journal of Neuroscience Methods, 198(2), 332-5. https://doi.org/10.1016/j.jneumeth.2011.03.014
Watanabe K, Akima H. Validity of Surface Electromyography for Vastus Intermedius Muscle Assessed By Needle Electromyography. J Neurosci Methods. 2011 Jun 15;198(2):332-5. PubMed PMID: 21463655.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validity of surface electromyography for vastus intermedius muscle assessed by needle electromyography. AU - Watanabe,Kohei, AU - Akima,Hiroshi, Y1 - 2011/04/02/ PY - 2010/12/24/received PY - 2011/02/10/revised PY - 2011/03/10/accepted PY - 2011/4/6/entrez PY - 2011/4/6/pubmed PY - 2011/10/8/medline SP - 332 EP - 5 JF - Journal of neuroscience methods JO - J Neurosci Methods VL - 198 IS - 2 N2 - Recently, a new recording technique for surface electromyography (EMG) of the deeper muscle component of the quadriceps femoris muscle group, i.e., vastus intermedius (VI) muscle, from the distal portion of the VI muscle has been developed; however, the effect of electrode location on EMG signal of the VI muscle remains unclear. The aim of this study is to compare neuromuscular activation detected at the middle and distal portions of the VI muscle, in order to clarify whether the surface EMG of the VI muscle can be used to assess the neuromuscular activation of the entire muscle. Six healthy men participated in this study. During incremental ramp contraction of isometric knee extension (~30% of maximal voluntary contraction), needle EMG was recorded from the middle and distal regions of the VI muscle and surface EMG was performed at the distal region of the VI muscle. Excellent correlation was observed between needle EMG at the middle and distal regions (r=0.897-0.984, p<0.001). No significant difference was observed between correlation coefficient of surface EMG detected at the distal versus needle EMG detected at the middle and that of surface EMG detected at distal versus needle EMG detected at distal (p<0.05). These results suggest that surface EMG at the distal portion of the VI muscle, which is the only region available for surface EMG, can be used to evaluate global neuromuscular activation of the VI muscle during isometric contraction at a low force level. SN - 1872-678X UR - https://www.unboundmedicine.com/medline/citation/21463655/Validity_of_surface_electromyography_for_vastus_intermedius_muscle_assessed_by_needle_electromyography_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0165-0270(11)00161-0 DB - PRIME DP - Unbound Medicine ER -