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Comparison of trunk activity during gait initiation and walking in humans

Jean-Charles Ceccato 1, 2, * Mathieu de Sèze 2 Jean-René Cazalets 2 Christine Azevedo Coste 1
* Corresponding author
1 DEMAR - Artificial movement and gait restoration
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : To understand the role of trunk muscles in maintenance of dynamic postural equilibrium we investigate trunk movements during gait initiation and walking, performing trunk kinematics analysis, Erector spinae muscle (ES) recordings and dynamic analysis. ES muscle expressed a metachronal descending pattern of activity during walking and gait initiation. In the frontal and horizontal planes, lateroflexion and rotation occur before in the upper trunk and after in the lower trunk. Comparison of ES muscle EMGs and trunk kinematics showed that trunk muscle activity precedes corresponding kinematics activity, indicating that the ES drive trunk movement during locomotion and thereby allowing a better pelvis mobilization. EMG data showed that ES activity anticipates propulsive phases in walking with a repetitive pattern, suggesting a programmed control by a central pattern generator. Our findings also suggest that the programs for gait initiation and walking overlap with the latter beginning before the first has ended.
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-00429399
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Submitted on : Wednesday, April 21, 2021 - 2:40:08 PM
Last modification on : Wednesday, April 21, 2021 - 2:41:37 PM
Long-term archiving on: : Thursday, July 22, 2021 - 6:47:15 PM

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Jean-Charles Ceccato, Mathieu de Sèze, Jean-René Cazalets, Christine Azevedo Coste. Comparison of trunk activity during gait initiation and walking in humans. PLoS ONE, Public Library of Science, 2009, 4 (12), pp.#e8193. ⟨10.1371/journal.pone.0008193⟩. ⟨lirmm-00429399⟩

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