The relative contribution to the plantar-flexor torque of the soleus motor units activated by the H reflex and M response in humans

Nicola A. Maffiuletti, Alain Martin, Jacques Van Hoecke, Marco Schieppati

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study proposes a method of quantifying the relative contribution to the plantar-flexor torque of soleus H and M responses evoked by tibial nerve stimulation. For ten subjects, the amplitude of the twitch produced by the H wave was plotted against the corresponding potential, for stimuli producing H without M (i.e. in the ascending portion of the H-recruitment curve). It was then assumed that the contribution of H to twitches produced by M plus H was similar for similar H waves on the curve-descending portion. Hence, the contribution of M was estimated, for the range of M waves including those accompanying H(max). The estimated mechanical contributions of H and M wave increase linearly with their potentials, the slope of the relationship being greater for H than M. The interpretation of this finding is discussed. A simple formula for assessing the contribution of the H wave to the twitch torque is given. Copyright (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalNeuroscience Letters
Volume288
Issue number2
DOIs
Publication statusPublished - Jul 14 2000

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H-Reflex
Torque
Tibial Nerve

Keywords

  • H reflex
  • Human
  • M response
  • Peak twitch tension
  • Soleus muscle
  • Twitch torque

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

The relative contribution to the plantar-flexor torque of the soleus motor units activated by the H reflex and M response in humans. / Maffiuletti, Nicola A.; Martin, Alain; Van Hoecke, Jacques; Schieppati, Marco.

In: Neuroscience Letters, Vol. 288, No. 2, 14.07.2000, p. 127-130.

Research output: Contribution to journalArticle

Maffiuletti, Nicola A. ; Martin, Alain ; Van Hoecke, Jacques ; Schieppati, Marco. / The relative contribution to the plantar-flexor torque of the soleus motor units activated by the H reflex and M response in humans. In: Neuroscience Letters. 2000 ; Vol. 288, No. 2. pp. 127-130.
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