Trunk muscle reflexes are elicited by small continuous perturbations in healthy subjects and patients with low-back pain

Type de document

Études primaires

Année de publication

2016

Langue

Anglais

Titre de la revue

Journal of Electromyography and Kinesiology

Première page

111

Dernière page

118

Résumé

Low-back pain (LBP) has been recognized as the leading cause of disability worldwide. Lumbar instability has been considered as an important mechanism of LBP and one potential contributor to lumbar stability is trunk muscle reflex activity. However, due to the differences in experimental paradigms used to quantify trunk mechanics and trunk reflexes it remains unclear as to what extent the reflex pathway contributes to overall lumbar stability. The goal of this work was to determine to what extent reflexes of various trunk muscles were elicited by the small continuous perturbations normally used to quantify trunk mechanics. Electromyographic (EMG) activity was measured bilaterally from 3 trunk extensor muscles and 3 trunk flexor muscles at four epochs: 25–50 ms, 50–75 ms, 75–100 ms and 100–125 ms following each perturbation. Reflex activity was seen in all muscles as 34 of the 48 muscle-epoch combinations showed a significant reflex response to either perturbations in the forward or backward direction. However, the reflex EMG activity did not correlate with mechanical estimates of the reflex response. Thus, even though reflexes are indeed elicited by the small perturbations used to quantify trunk mechanics, their exact contribution to overall lumbar stability remains unknown.

Mots-clés

Lésion du tronc, Trunk injury, Maux de dos, Backache, Affection dorsale, Back disorder, Électromyographie, Electromyography, Épreuve de la force musculaire, Muscle testing, Recherche sur la douleur, Research on pain

Numéro de projet IRSST

0099-8310

Ce document n'est pas disponible pour le moment.

Partager

COinS