Alternate muscle activity patterns among synergists of the quadriceps femoris including the vastus intermedius during low-level sustained contraction in men

Hiroshi Akima, Akira Saito, Kohei Watanabe, Motoki Kouzaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Introduction: We quantified the alternate muscle activity among four synergists of the quadriceps femoris (QF), including the vastus intermedius (VI), during low-level sustained contraction. Methods: Surface electromyograms (EMGs) were recorded from the VI, vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF) in 11 healthy men during isometric knee extension at 2.5% maximum voluntary contraction for 60 min to determine alternate muscle activity among the four synergists of the QF. Results: Alternate activity was primarily found between the RF and VI, VL, or VM, and rarely found among the vasti muscles. Multiple muscle comparison revealed the duration of alternate activity in the RF/VI+VL+VM combination remained high throughout the experiment, although the frequency of that combination did not. Conclusions: These results suggested that there is a fixed muscle combination, i.e., RF and the 3 vasti muscles, to perform low-intensity sustained contraction in the human QF.

Original languageEnglish
Pages (from-to)86-95
Number of pages10
JournalMuscle and Nerve
Volume46
Issue number1
DOIs
Publication statusPublished - 2012 Jul
Externally publishedYes

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Quadriceps Muscle
Muscles
Electromyography

Keywords

  • Neuromuscular modulation
  • Quadriceps femoris
  • Surface EMG
  • Vastus intermedius

ASJC Scopus subject areas

  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)
  • Physiology

Cite this

Alternate muscle activity patterns among synergists of the quadriceps femoris including the vastus intermedius during low-level sustained contraction in men. / Akima, Hiroshi; Saito, Akira; Watanabe, Kohei; Kouzaki, Motoki.

In: Muscle and Nerve, Vol. 46, No. 1, 07.2012, p. 86-95.

Research output: Contribution to journalArticle

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