Skip Navigation LinksHome > October 2009 - Volume 26 - Issue 5 > Motor Imagery Facilitates the Spinal Motor Neurons Without H...
Journal of Clinical Neurophysiology:
doi: 10.1097/WNP.0b013e3181baaaa1
Original Article

Motor Imagery Facilitates the Spinal Motor Neurons Without Hemispheric Asymmetry

Ichikawa, Hiroo*; Kimura, Jun; Taniguchi, Shinichirou; Hara, Motohiko§; Fujisawa, Reiko; Shimizu, Hiroshi; Yamada, Thoru; Kawamura, Mitsuru*

Collapse Box

Abstract

Purpose: To determine possible hemispheric differences of motor imagery in facilitating the anterior horn cells.

Methods: We conducted a side-to-side comparison of motor imagery to counter rest-induced suppression of spinal motor neurons in 10 right-handed healthy adults using the F wave as a measure of excitability. Studies consisted of sequential recording of F waves from the abductor pollicis brevis with 100 supramaximal stimuli applied to the median nerve on three consecutive sessions: (1) after standardized hand exercise to establish the baseline; (2) after immobilizing abductor pollicis brevis bilaterally for 3 hours, with one side assigned to relaxation task and the other side to motor imagery task; and (3) after standardized hand exercise to assess a recovery. The same sequence was repeated, switching the side of relaxation and motor imagery tasks.

Results: F-wave persistence and average amplitude showed a significant decrease (P < 0.01) from baseline after relaxation task, recovering quickly after exercise, but no change (P > 0.05) after motor imagery task. The results showed no significant differences (P > 0.05) between dominant and nondominant hands.

Conclusion: Motor imagery facilitates the spinal motor neurons without hemispheric asymmetry.

Copyright © 2009 American Clinical Neurophysiology Society

Login

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.