Effects of Electro-Needling Back-Shu Points on Corticospinal Excitability of Lower Limb Motor Cortex
Objective:To observe the effects of electro-needling back-Shu points on corticospinal excitability of lower limb motor cortex,and to explore the specific connections between the meridian system and the body surface(back,lumbar region and lower limbs).Methods:20 healthy subjects were included in the study,utilizing a crossover design(each subject randomly assigned to different groups in succession)to observe the effects of electro-needling Xinshu(BL15)and Shenshu(BL23)on the corticospinal excitability of the tibialis anterior(TA),gastrocnemius(GA)and vastus medialis(VM)muscles of the lower limbs.The subjects were divided into Group A(electro-needling BL15),Group B(electro-needling BL23),group C(sham electro-needling BL15)and group D(sham electro-needling BL23).Single-pulse transcranial magnetic stimulation was used to measure the motor-evoked potentials(MEPs),latency,and motor thresholds of the erector spinae(ES),TA,GA and VM muscles before and after electro-acupuncture(EA).Results:After the EA,the total amplitude of MEPs in TA,GA,VM and ES were significantly increased than that before the EA in group A and group B(P＜0.01),there was no significant change in the sham EA groups(group C and group D).There were significant differences in the total amplitude of MEPs in TA,GA,VM and ES between group A and group C,also between group B and group D(P＜0.01),but there was no significant difference in the total amplitude of MEPs in TA,GA and VM after the EA between group A and group B(P＞0.05).There were no significant changes in the latency and motor threshold of MEPs in the four groups before and after the EA.Conclusion:EA can enhance the corticospinal excitability of TA,GA and VM in lower limb motor cortex,suggesting that there may be a specific connection between the back,lumbar region and lower limbs.
BL15BL23Corticospinal excitabilityTranscranial magnetic stimulationConnections between meridian and body surface
万方数据
维普
