Corticomotor reorganization during short-term visuomotor training in the lower back: A randomized controlled study.
TMS
corticomotor reorganization
lower back
motor learning
Journal
Brain and behavior
ISSN: 2162-3279
Titre abrégé: Brain Behav
Pays: United States
ID NLM: 101570837
Informations de publication
Date de publication:
08 2020
08 2020
Historique:
received:
16
01
2020
revised:
29
04
2020
accepted:
17
05
2020
pubmed:
8
7
2020
medline:
9
6
2021
entrez:
8
7
2020
Statut:
ppublish
Résumé
Accumulating evidence suggests that motor skill training is associated with structural and functional reorganization of the primary motor cortex. However, previous studies have focussed primarily upon the upper limb, and it is unclear whether comparable reorganization occurs following training of other regions, such as the lower back. Although this holds important implications for rehabilitation, no studies have examined corticomotor adaptations following short-term motor training in the lower back. The aims of this study were to (a) determine whether a short-term lumbopelvic tilt visuomotor task induced reorganization of the corticomotor representations of lower back muscles, (b) quantify the variability of corticomotor responses to motor training, and (c) determine whether any improvements in task performance were correlated with corticomotor reorganization. Participants were allocated randomly to perform a lumbopelvic tilt motor training task (n = 15) or a finger abduction control task involving no lumbopelvic movement (n = 15). Transcranial magnetic stimulation was used to map corticomotor representations of the lumbar erector spinae before, during, and after repeated performance of the allocated task. No relationship between corticomotor reorganization and improved task performance was identified. Substantial variability was observed in terms of corticomotor responses to motor training, with approximately 50% of participants showing no corticomotor reorganization despite significant improvements in task performance. These findings suggest that short-term improvements in lower back visuomotor task performance may be driven by changes in remote subcortical and/or spinal networks rather than adaptations in corticomotor pathways. However, further research using tasks of varying complexities and durations is required to confirm this hypothesis.
Identifiants
pubmed: 32633899
doi: 10.1002/brb3.1702
pmc: PMC7428511
doi:
Types de publication
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e01702Subventions
Organisme : National Health and Medical Research Council
ID : APP105040
Organisme : National Health and Medical Research Council
ID : APP1091302
Organisme : National Health and Medical Research Council
ID : APP1102905
Organisme : Medical Research Council
ID : APP105040
Pays : United Kingdom
Organisme : Medical Research Council
ID : APP1102905
Pays : United Kingdom
Informations de copyright
© 2020 The Authors. Brain and Behavior published by Wiley Periodicals LLC.
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