Assessment of soleus motoneuronal excitability using the joint angle dependent H reflex in humans

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42 引文 斯高帕斯(Scopus)

摘要

As variations in the amplitude of H reflex potentials can be influenced by changes in muscle length, motoneuronal excitability in terms of H reflex during free movement has long been argued. With the maximal M response controlled, the present study compared several H reflex parameters in order to assess motoneuronal excitability of the resting soleus for different ankle angles (plantarflexion 20°, neutral, and dorsiflexion 20°). All H-related parameters were dependent on joint angle, suggesting that soleus motoneuronal excitability in the dorsiflexed position was significantly suppressed. By contrast, soleus motoneuronal excitability in the plantarflexed position was not effectively modulated since H-related parameters did not differ from their neutral-position analogs. Methodologically, assessment of joint angle-dependent modulation of motoneuronal excitability requires meticulous control of M responses and selection of appropriate parameters that are insensitive to possible physical modulation and spatial shift of the M recruitment curve confounded by geometrical factors.

原文English
頁(從 - 到)361-366
頁數6
期刊Journal of Electromyography and Kinesiology
12
發行號5
DOIs
出版狀態Published - 2002 十月

All Science Journal Classification (ASJC) codes

  • 神經科學(雜項)
  • 生物物理學
  • 神經病學(臨床)

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