Premium
Modulation of motor evoked potentials by muscle vibration: The role of vibration frequency
Author(s) -
Siggelkow Sabine,
Kossev Andon,
Schubert Margot,
Kappels HansHermann,
Wolf Werner,
Dengler Reinhard
Publication year - 1999
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199911)22:11<1544::aid-mus9>3.0.co;2-8
Subject(s) - transcranial magnetic stimulation , silent period , evoked potential , electromyography , stimulation , electrophysiology , muscle contraction , medicine , neuroscience , anatomy , physical medicine and rehabilitation , psychology , audiology
Augmentation of motor evoked potentials (MEPs) by muscle vibration (MV) was studied in 10 healthy subjects with regard to the vibration frequency (VF). The extensor carpi radialis muscle (ECR) was vibrated using VFs of 80, 120, and 160 Hz. Motor evoked potentials following transcranial magnetic stimulation were recorded simultaneously from the vibrated ECR and the antagonist flexor carpi radialis muscle (FCR) without MV, 0.5 s and 3 s after onset of MV and 1 s after offset. Only the VFs of 80 Hz and 120 Hz caused MEP augmentation and latency shortening in ECR, whereas depression of MEPs in FCR was induced by all VFs used. It appears that MEP augmentation and latency shortening in ECR are mediated by the primary muscle spindle endings which respond with optimal discharge rates to VFs of up to 100 Hz. Motor evoked potential depression in FCR, being well expressed also with VF 160 Hz, seems to involve other dynamic mechanoreceptors. © 1999 John Wiley & Sons, Inc. Muscle Nerve 22: 1544–1548, 1999