Motor learning induces time‐dependent plasticity that is observable at the spinal cord level

Giboin, Louis-Solal; Tokuno, Craig; Kramer, Andreas; Henry, Mélanie; Gruber, Markus

Motor learning induces time‐dependent plasticity that is observable at the spinal cord level

Dateien

Giboin_2-c7w22jp2oc001.pdfGröße: 1012.66 KBDownloads: 193

Datum

2020

Autor:innen

Giboin, Louis-Solal

Tokuno, Craig

Kramer, Andreas

Henry, Mélanie

Gruber, Markus

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

The Journal of Physiology. Wiley. 2020, 598(10), pp. 1943-1963. ISSN 0022-3751. eISSN 1469-7793. Available under: doi: 10.1113/JP278890

Zusammenfassung

Spinal cord plasticity is an important contributor of motor learning in humans, but its mechanisms are still poorly documented. In particular, it remains unclear whether short-term spinal adaptations are general or task-specific.
As a marker of neural changes that are observable at spinal level, we measured the H-reflex amplitude in the soleus muscle of 18 young healthy human adults before, immediately after (acquisition), and 24 h after (retention) the learning of a skilled task (i.e., one-legged stance on a tilt board). H-reflexes were elicited 46 ± 30 ms before touching the tilt board. Additionally, and at the same time points, we measured the H-reflex with the subject sitting at rest and while performing an unskilled and untrained task (i.e., one-legged stance on the floor).
After task acquisition, there was a decrease of the H-reflex amplitude measured at rest but not during the skilled or the unskilled task. At retention, there was a decrease of the H-reflex when measured during the skilled task but not during the unskilled task or at rest. Performance increase was not associated with changes in the H-reflex amplitude.
After the acquisition of a new skilled task, spinal changes seemed to be general (i.e., observable at rest). However, 24 h after, these changes were task-specific (i.e., observable only while performing the trained task). These results imply that skill training induces a time-dependent reorganization of the modulation of spinal networks, which possibly reflects a time-dependent optimization of the feedforward motor command.

Fachgebiet (DDC)

796 Sport

Schlagwörter

H-reflex; specificity; balance training; postural control; retention; acquisition; generalization

Zitieren

ISO 690

GIBOIN, Louis-Solal, Craig TOKUNO, Andreas KRAMER, Mélanie HENRY, Markus GRUBER, 2020. Motor learning induces time‐dependent plasticity that is observable at the spinal cord level. In: The Journal of Physiology. Wiley. 2020, 598(10), pp. 1943-1963. ISSN 0022-3751. eISSN 1469-7793. Available under: doi: 10.1113/JP278890

BibTex

@article{Giboin2020-05Motor-48989,
  year={2020},
  doi={10.1113/JP278890},
  title={Motor learning induces time‐dependent plasticity that is observable at the spinal cord level},
  number={10},
  volume={598},
  issn={0022-3751},
  journal={The Journal of Physiology},
  pages={1943--1963},
  author={Giboin, Louis-Solal and Tokuno, Craig and Kramer, Andreas and Henry, Mélanie and Gruber, Markus}
}

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