2015年12月
Motor imagery muscle contraction strength influences spinal motor neuron excitability and cardiac sympathetic nerve activity
JOURNAL OF PHYSICAL THERAPY SCIENCE
- ,
- ,
- 巻
- 27
- 号
- 12
- 開始ページ
- 3793
- 終了ページ
- 3798
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1589/jpts.27.3793
- 出版者・発行元
- SOC PHYSICAL THERAPY SCIENCE
[Purpose] The aim of this study was to investigate the changes in spinal motor neuron excitability and autonomic nervous system activity during motor imagery of isometric thenar muscle activity at 10% and 50% maximal voluntary contraction (MVC). [Methods] The F-waves and low frequency/high frequency (LF/HF) ratio were recorded at rest, during motor imagery, and post-trial. For motor imagery trials, subjects were instructed to imagine thenar muscle activity at 10% and 50% MVC while holding the sensor of a pinch meter for 5 min. [Results] The F-waves and LF/HF ratio during motor imagery at 50% MVC were significantly increased compared with those at rest, whereas those during motor imagery at 10% MVC were not significantly different from those at rest. The relative values of the F/M amplitude ratio during motor imagery at 50% MVC were significantly higher than those at 10% MVC. The relative values of persistence and the LF/HF ratio during motor imagery were similar during motor imagery at the two muscle contraction strengths. [Conclusion] Motor imagery can increase the spinal motor neuron excitability and cardiac sympathetic nerve activity. Motor imagery at 50% MVC may be more effective than motor imagery at 10% MVC.
- リンク情報
- ID情報
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- DOI : 10.1589/jpts.27.3793
- ISSN : 0915-5287
- eISSN : 2187-5626
- PubMed ID : 26834354
- Web of Science ID : WOS:000368605500039