The Immediate And Delayed Effects Of Regional Vibration On Motor Cortex In The Patients With Stroke

Objective To explore the effects of regional vibration stimulation on cerebral cortex in the patients with infarction.Subjects and Methods:Part 1 Twenty neurologically healthy right-handed volunteers were randomly divided into group A(10 cases)and group B(10 cases).Group A were received low frequency local vibration treatment(7hz,7mm),while group B were given high frequency local vibration treatment(12hz,7mm).The MEP-induced cortex latency and CMCT of these two groups were recorded before,after and 1 hour after treatment by using repetitive transcranial magnetic stimulation(rTMS)Part 2 Twenty patients with stroke were randomly divided into group A(10 cases)and group B(10 cases).Group A were received low frequency local vibration treatment(7hz,7mm),while group B were given high frequency local vibration treatment(12hz,7mm).The MEP-induced cortex latency and CMCT of these two groups were recorded before,after and 1 hour after treatment by using repetitive transcranial magnetic stimulation(rTMS).ResultPart 1 Compared with pre-treatment,MEP-induced cortex latency and CMCT recorded 1 hour after treatment of group A was significantly lower.However,it had no significant changes after treatment.MEP-induced cortex latency and CMCT of group B were reduced after local vibration treatment.MEP-induced cortex latency in·post-treatment had significant differences(P<0.05)Part 2 Compared with pre-treatment,CMCT recorded 1 hour after treatment of group A was significantly lower.However,other index of group A had no significant changes after treatment.MEP-induced cortex latency and CMCT of group B were reduced after local vibration treatment.However,MEP-induced cortex latency in post-treatment had no significant differences.ConclusionAppropriate frequency of local vibration stimulation can significantly improve the excitability of the damaged cortex.local vibration stimulation can affect the activitiesof the nervous system and restore the normal rhythm of nerve muscle movement.