Alternative TitleEffects of lower-limb segmental muscle vibration on primary motor cortex short-latency intracortical inhibition and spinal excitability in healthy humans
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博士論文全文, 博士論文要旨, 最終試験結果の要旨, 論文審査の要旨
We examined the effects of lower-limb segmental muscle vibration (SMV) on intracortical and spinal excitability in 13 healthy participants (mean age: 34.9 ± 7.8 years, 12 males, 1 female). SMV at 30 Hz was applied to the hamstrings, gastrocnemius, and soleus muscles for 5 min. Paired-pulse protocols were used to investigate motor-evoked potentials (i.e., test MEP), short-interval intracortical inhibition (SICI) and short-interval intracortical facilitation (SICF) from the abductor hallucis muscle (AbdH). These assessments were compared to the results of a control experiment (i.e., non-vibration) in the same participants. F-waves were evaluated from the AbdH on the right (vibration side) and left (non-vibration side) sides, and we calculated the ratio of the F-wave amplitude to the M-response amplitude (F/M ratio). These assessments were obtained before, immediately after, and 10, 20, and 30 min after SMV. No change was observed immediately after SMV, but there was a significant decrease in SICI over time (before vs. 30 min after, p = 0.021; immediately after vs. 30 min after, p = 0.015). There were no significant changes in test MEP, SICF, or the F/M ratio. SMV might cause a decrease in SICI over time in the AbdH of healthy subjects.Kodai Miyara, Seiji Etoh, Kentaro Kawamura, Atsuo Maruyama, Takehiro Kuronita, Akihiko Ohwatashi & Megumi ShimodozonoEffects of lower limb segmental muscle vibration on primary motor cortex short-latency intracortical inhibition and spinal excitability in healthy humansExperimental Brain Research (2022) 240:311–320This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s00221-021-06257-8
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