Spinal plasticity with motor imagery practice.
Adult
Electric Stimulation
/ methods
Female
Femoral Nerve
/ physiology
H-Reflex
/ physiology
Humans
Male
Motor Cortex
/ physiology
Movement
/ physiology
Muscle Contraction
/ physiology
Muscle, Skeletal
/ physiology
Neural Inhibition
/ physiology
Neuronal Plasticity
/ physiology
Neurons, Afferent
/ physiology
Peroneal Nerve
/ physiology
Spinal Cord
/ physiology
Spine
/ physiology
Synaptic Transmission
/ physiology
D1 presynaptic inhibition
H-reflex
heteronymous Ia facilitation
soleus
triceps surae
Journal
The Journal of physiology
ISSN: 1469-7793
Titre abrégé: J Physiol
Pays: England
ID NLM: 0266262
Informations de publication
Date de publication:
02 2019
02 2019
Historique:
received:
19
06
2018
accepted:
09
11
2018
pubmed:
13
11
2018
medline:
14
5
2020
entrez:
13
11
2018
Statut:
ppublish
Résumé
While a consensus has now been reached on the effect of motor imagery (MI) - the mental simulation of an action - on motor cortical areas, less is known about its impact on spinal structures. The current study, using H-reflex conditioning paradigms, examined the effect of a 20 min MI practice on several spinal mechanisms of the plantar flexor muscles. We observed modulations of spinal presynaptic circuitry while imagining, which was even more pronounced following an acute session of MI practice. We suggested that the small cortical output generated during MI may reach specific spinal circuits and that repeating MI may increase the sensitivity of the spinal cord to its effects. The short-term plasticity induced by MI practice may include spinal network modulation in addition to cortical reorganization. Kinesthetic motor imagery (MI) is the mental simulation of a movement with its sensory consequences but without its concomitant execution. While the effect of MI practice on cortical areas is well known, its influence on spinal circuitry remains unclear. Here, we assessed plastic changes in spinal structures following an acute MI practice. Thirteen young healthy participants accomplished two experimental sessions: a 20 min MI training consisting of four blocks of 25 imagined maximal isometric plantar flexions, and a 20 min rest (control session). The level of spinal presynaptic inhibition was assessed by conditioning the triceps surae spinal H-reflex with two methods: (i) the stimulation of the common peroneal nerve that induced D1 presynaptic inhibition (H
Identifiants
pubmed: 30417924
doi: 10.1113/JP276694
pmc: PMC6355716
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
921-934Informations de copyright
© 2018 The Authors. The Journal of Physiology © 2018 The Physiological Society.
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