{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,29]],"date-time":"2025-08-29T07:40:15Z","timestamp":1756453215424,"version":"3.44.0"},"reference-count":36,"publisher":"Korean Academy of Rehabilitation Medicine","issue":"4","license":[{"start":{"date-parts":[[2025,8,22]],"date-time":"2025-08-22T00:00:00Z","timestamp":1755820800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["e-arm.org"],"crossmark-restriction":true},"short-container-title":["Ann Rehabil Med"],"published-print":{"date-parts":[[2025,8,31]]},"abstract":"<jats:p>Objective: To investigate muscle tone changes over time in contralateral homonymous muscles when unilateral muscles are stimulated, using F-wave measurements, we examined whether vibratory stimulation on the contralateral homonymous muscle of the affected side may reduce spasticity, whose optimal duration remains unclear.Methods: Vibratory stimulation was applied to the right hand of healthy adults, using parameters of 80 Hz frequency, 0.4 mm amplitude, 400 g load, and 195 seconds of duration on the abductor digiti minimi muscle. F-wave was measured in the left hand before stimulation, at seven intervals during stimulation, and immediately after.Results: The F\/M amplitude ratio decreased immediately at stimulation onset, at 30 seconds, and at 60 seconds compared to baseline. A least-squares analysis revealed a negative slope from baseline to 60 seconds (f(x)=-0.11x+1.12), while the slope became positive after 90 seconds, continuing after stimulation ended (f(x)=0.04x+0.82).Conclusion: Unilateral vibratory stimulation may decrease excitability in the spinal anterior horn cells of the contralateral homonymous muscle for up to 75 seconds post-stimulation, suggesting a potential mechanism for spasticity management.<\/jats:p>","DOI":"10.5535\/arm.240107","type":"journal-article","created":{"date-parts":[[2025,8,22]],"date-time":"2025-08-22T05:25:01Z","timestamp":1755840301000},"page":"226-233","update-policy":"https:\/\/doi.org\/10.5535\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Unilateral Vibratory Stimulation Inhibits Contralateral Spinal Anterior Horn Cells in Homonymous Muscles for the First 75 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