Influence of Motor Imagery with Isometric Opponens Pollicis Activity on the Excitability of Spinal Neural Function:—Comparison of 30%MVC Motor Imagery with 50%MVC Motor Imagery—

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[Purpose] To study the difference of the excitability of spinal neural function at 30 and 50% maximum voluntary contraction (MVC) motor imagery. [Subjects] Subjects were 15 healthy subjects with a mean age of 25.4±4.75 years. [Method] We recorded the F-wave under 3 conditions: the rest condition; the 30 and 50%MVC motor imagery condition, when subjects were asked to imagine the contraction of holding a pinch meter; and the after imagery condition, immediately, and 5, 10 and 15 minutes after imagery. [Result] Both persistence and the amplitude ratio of F/M during 30 and 50%MVC motor imagery were significantly higher than that at rest. The relative value of 50%MVC motor imagery to rest was not significant different from that of 30%MVC motor imagery. [Conclusion] The results suggest that motor imagery increases the excitability of spinal neural function, and that 30%MVC motor imagery sufficiently increases the excitability of the spinal neural function.
理学療法科学学会の論文