Effects of Motor Learning on Corticospinal Tract Excitability During Motor Imagery

We aimed to examine the effects of motor performance improvements produced by practice on corticospinal tract excitability during motor imagery (MI) of identical movements. Participants performed a motor task with no guidelines displayed on the monitor (performance test); the participants only imagi...

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Veröffentlicht in:Perceptual and motor skills 2024-10, Vol.131 (5), p.2030-2044
Hauptverfasser: Takenaka, Yuma, Tomisaki, Yuka, Hirose, Ittetsu, Sugawara, Kenichi
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container_issue 5
container_start_page 2030
container_title Perceptual and motor skills
container_volume 131
creator Takenaka, Yuma
Tomisaki, Yuka
Hirose, Ittetsu
Sugawara, Kenichi
description We aimed to examine the effects of motor performance improvements produced by practice on corticospinal tract excitability during motor imagery (MI) of identical movements. Participants performed a motor task with no guidelines displayed on the monitor (performance test); the participants only imagined performing the task without performing the movement (MI test), and the participants performed the power output and then adjusted it (exercise). The output force conditions were 20, 40, and 60% of the maximum voluntary contraction, and the objective was for 21 participants to learn each output force condition. The outcome of the performance test was calculated as the difference between the actual motor output and the target. During the MI test, we applied a single transcranial magnetic stimulation during imagery, assessed the corticospinal tract excitability of the right first dorsal interosseous by motor-evoked potential (MEP) amplitude, and recorded the vividness of the MI in each trial. We evaluated performance and MI before practice (Pre-test), after 150 practice sessions (Post-test 1), and after another 150 practice sessions (Post-test 2). The MEP amplitude was significantly reduced at Post-test 2 compared to Pre-test. The vividness of the MI improved with practice. Corticospinal tract excitability during MI decreased as motor performance improved. Thus, actual motor practice was also reflected in the MI of the exercise. Performance improvement was accompanied by a decrease in redundant activity, enhancing the efficiency and appropriateness of the exercise.
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subjects Adult
Electromyography
Evoked Potentials, Motor - physiology
Female
Humans
Imagination - physiology
Learning - physiology
Male
Motor Skills - physiology
Practice, Psychological
Psychomotor Performance - physiology
Pyramidal Tracts - physiology
Transcranial Magnetic Stimulation - methods
Young Adult
title Effects of Motor Learning on Corticospinal Tract Excitability During Motor Imagery
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