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- Title
经颅磁声刺激与经颅超声刺激诱发肌电运动阈值的对比研究.
- Authors
王会琴; 周晓青; 刘世坤; 刘志朋; 殷 涛
- Abstract
Objective To compare the cortical motion thresholds respectively by transcranial magneto-acoustic stimulation (TMAS) and transcranial ultrasound stimulation (TUS) and evaluate the efficacy and potential mechanism of TMAS on motor cortex when compared with TUS by collecting and analyzing the TMAS- and TUS- induced electromyography (EMG) signals. Methods A set of TUS-TMAS system for mice was set up. The stimulation parameters with different ultrasound intensities in TUS and TMAS were designed. To detect the TMAS and TUS motion thresholds of mice, the EMG induced by TMAS and TUS were collected and analyzed. Results When the spatial-peak temporal-average intensity (IJ of the target was more than 144 mW/cm2, both TUS and TMAS could acquire the motion threshold of mice, while TMAS caused more stable motion feedback; in case of 25 mW/cm2 <Ispta<144 mW/cm2, only TMAS could acquire the threshold of motion in mice; in case of <Ispta< 25 mW/cm2, neither TUS nor TMAS could acquire the threshold of motion in mice. Conclusion Compared with TUS, TMAS can excite the motor cortex of mice under the action of lower ultrasound intensity <Ispta, and acquire the motion threshold of mice. The results show that TMAS is more effective for motivating motor cortex than TUS on regulation ability. TMAS is supposed to function as a dual -mode stimulation combining the electric field of the magneto -acoustic effect and the mechanical force of TUS. The spatially and temporally synchronousacoustic field and the magneto-acoustic coupling electric field induce a coordinated modulation in motor cortex of mice.
- Publication
Chinese Medical Equipment Journal, 2019, Vol 40, Issue 1, p14
- ISSN
1003-8868
- Publication type
Article
- DOI
10.19745/j.1003-8868.2019004