Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Presynaptic inhibition mechanisms may subserve the spinal excitability modulation induced by neuromuscular electrical stimulation

Abstract : This study aimed at deciphering the origins of spinal excitability modulation that follows neuromuscular electrical stimulation (NMES). Ten participants (age: 24.6 +/- 4.2 years) performed 2 randomized NMES sessions on plantar flexors with frequencies of stimulations of 20 or 100 Hz (pulse width: 1 ms) at 20% of maximal voluntary contraction (MVC). Before and after each session, the posterior tibial nerve was stimulated to record H-reflex of soleus (SOL), gastrocnemius medialis (GM) and gastrocnemius lateralis (GL). D1 presynaptic inhibition was assessed by conditioning H reflex with prior common peroneal nerve stimulation. Resting H-reflex of SOL decreased after both protocols, but in a greater extent following the 100 Hz session (100 Hz: 34.6 +/- 7.3%, 20 Hz: 17.1 +/- 3.8%; P = 0.002), accompanied by an increase of presynaptic inhibition ( + 22 +/- 5.8% at 100 Hz vs. + 8 +/- 3.7% at 20 Hz, P < 0.001). GM and GL spinal excitability and presynaptic inhibition were also altered after NMES, but in a similarly extent after 20 Hz and 100 Hz protocols. Neuromuscular fatigue following a single session of NMES involves spinal presynaptic circuitry, even at low stimulation frequency. The spinal sensitivity to NMES seems also muscle dependent.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01857728
Contributeur : Caps - Université de Bourgogne <>
Soumis le : vendredi 17 août 2018 - 10:36:41
Dernière modification le : mercredi 14 octobre 2020 - 04:04:33

Identifiants

Collections

Citation

Sidney Grosprêtre, Nicolas Gueugneau, Alain Martin, Romuald Lepers. Presynaptic inhibition mechanisms may subserve the spinal excitability modulation induced by neuromuscular electrical stimulation. Journal of Electromyography and Kinesiology, Elsevier, 2018, 40, pp.95 - 101. ⟨10.1016/j.jelekin.2018.04.012⟩. ⟨hal-01857728⟩

Partager

Métriques

Consultations de la notice

83