European Journal of Applied Physiology and Occupational Physiology

, Volume 51, Issue 3, pp 435–440

A comparison of the contractile properties of the human gastrocnemius and soleus muscles

  • A. A. Vandervoort
  • A. J. McComas
Article

DOI: 10.1007/BF00429079

Cite this article as:
Vandervoort, A.A. & McComas, A.J. Europ. J. Appl. Physiol. (1983) 51: 435. doi:10.1007/BF00429079

Summary

Twitch speeds and potentiating capacities have been determined for human medial and lateral gastrocnemius and soleus muscles. The experiments involved the application of submaximal Stimuli to the respective muscle beilies, with monitoring of the evoked compound action potentials (M-waves) during repetitive stimulation. Contrary to an earlier report, the lateral gastrocnemius was found to have a significantly shorter mean contraction time (100.0±10.8 ms) than the soleus (156.5±14.7 ms) and this value was also significantly different from that of the medial gastrocnemius (113.7±19.6 ms). The mean half-relaxation time for each muscle also differed significantly from those for the other two muscles. A further contrast between the muscles was that potentiation of the twitch, following a 3-s tetanus at 50 Hz, was significantly greater in the lateral gastrocnemius than in soleus (mean values 60.4±43.1% and 2.6±3.3% respectively).

Key words

Human triceps suraeGastrocnemiusSoleusTwitch speedTwitch potentiation

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • A. A. Vandervoort
    • 1
  • A. J. McComas
    • 1
  1. 1.Departments of Medicine and NeurosciencesMcMaster UniversityHamiltonCanada
  2. 2.Neurology, 4U 7McMaster University Medical CentreHamiltonCanada