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RESEARCH PRODUCT
Long-term effects on motor cortical excitability induced by repeated muscle vibration during contraction in healthy subjects
G. M. FilippiGiacomo KochBarbara MarconiSilvia SalernoVincenzo Maria SaraceniFilippo CamerotaCarlo CaltagironeCristiano PecchioliRomildo Donsubject
MaleMotor disorderpaired-pulse tmsTime FactorsContraction (grammar)H-Reflex; Analysis of Variance; Humans; Electromyography; Neural Inhibition; Electric Stimulation; Muscle Skeletal; Motor Cortex; Brain Mapping; Vibration; Evoked Potentials Motor; Adult; Middle Aged; Muscle Contraction; Transcranial Magnetic Stimulation; Time Factors; Female; Malemedicine.medical_treatmentH-ReflextmsEvoked PotentialsBrain Mappingcortical plasticitySkeletalMiddle AgedTranscranial Magnetic Stimulationmedicine.anatomical_structureMotorNeurologyAnesthesiaMuscleFemaleSettore MED/26 - NeurologiaPrimary motor cortexmedicine.symptomPsychologyMuscle ContractionMotor cortexMuscle contractionAdultintracortical inhibitionVibrationNOmuscle vibrationmotor cortexNeuroplasticitymedicineHumansMuscle SkeletalAnalysis of VarianceneurorehabilitationElectromyographytms; muscle vibration; paired-pulse tms; neurorehabilitation; motor cortex; cortical plasticity; intracortical inhibitionNeural InhibitionEvoked Potentials Motormedicine.diseaseElectric Stimulationbody regionsTranscranial magnetic stimulationNeurology (clinical)NeuroscienceExtensor Digitorum Communisdescription
article i nfo Objective: The effects of a novel repeated muscle vibration intervention (rMV; 100 Hz, 90 min over 3 consecutive days) on corticomotor excitability were studied in healthy subjects. Methods: rMV was applied over the flexor carpi radialis (FCR) during voluntary contraction (experiment 1), during relaxation and during contraction without vibration (experiment 2). Focal transcranial magnetic stimulation (TMS) was applied before rMV and one hour, and one, two and three weeks after the last muscle vibration intervention. At each of these time points, we assessed the motor map area and volume in the FCR, extensor digitorum communis (EDC) and abductor digiti minimi (ADM). Short-interval intracortical inhibition (SICI) and facilitation (ICF) were tested for the flexor/extensor muscles alone. Results: Following rMV under voluntary contraction, we observed a significant reduction in the FCR map volumes and an enhancement in the EDC. SICI was increased in the FCR and reduced in the EDC. These changes persisted for up to two weeks and occurred at the cortical level in the hemisphere contralateral to the side of the intervention. Conclusion: We conclude that rMV, applied during a voluntary contraction, may induce prolonged changes in the excitatory/inhibitory state of the primary motor cortex. These findings may represent an important advance in motor disorder rehabilitation.
year | journal | country | edition | language |
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2008-01-01 |