NDLI: Motor imagery muscle contraction strength influences spinal motor neuron excitability and cardiac sympathetic nerve activity.

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Motor imagery muscle contraction strength influences spinal motor neuron excitability and cardiac sympathetic nerve activity.

Content Provider	Europe PMC
Author	Bunno, Yoshibumi Suzuki, Toshiaki Iwatsuki, Hiroyasu
Copyright Year	2015
Abstract	[Purpose] The aim of this study was to investigate the changes in spinal motor neuronexcitability and autonomic nervous system activity during motor imagery of isometricthenar muscle activity at 10% and 50% maximal voluntary contraction (MVC). [Methods] TheF-waves and low frequency/high frequency (LF/HF) ratio were recorded at rest, during motorimagery, and post-trial. For motor imagery trials, subjects were instructed to imaginethenar muscle activity at 10% and 50% MVC while holding the sensor of a pinch meter for5 min. [Results] The F-waves and LF/HF ratio during motor imagery at 50% MVC weresignificantly increased compared with those at rest, whereas those during motor imagery at10% MVC were not significantly different from those at rest. The relative values of theF/M amplitude ratio during motor imagery at 50% MVC were significantly higher than thoseat 10% MVC. The relative values of persistence and the LF/HF ratio during motor imagerywere similar during motor imagery at the two muscle contraction strengths. [Conclusion]Motor imagery can increase the spinal motor neuron excitability and cardiac sympatheticnerve activity. Motor imagery at 50% MVC may be more effective than motor imagery at 10%MVC.
ISSN	09155287
Volume Number	27
PubMed Central reference number	PMC4713793
Issue Number	12
PubMed reference number	26834354
Journal	Journal of Physical Therapy Science [J Phys Ther Sci]
e-ISSN	21875626
DOI	10.1589/jpts.27.3793
Language	English
Publisher	The Society of Physical Therapy Science
Publisher Date	2015-12-28
Access Restriction	Open
Rights License	This is an open-access article distributed under the terms of the CreativeCommons Attribution Non-Commercial No Derivatives (by-nc-nd) License. 2015©by the Society of Physical Therapy Science. Published by IPECInc.
Subject Keyword	Motor imagery F-wave Autonomic nervous system activity
Content Type	Text
Resource Type	Article
Subject	Physical Therapy, Sports Therapy and Rehabilitation

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