Low-Intensity Transcranial Ultrasound Stimulation Modulates the Excitability of Motor Cortical Neural Activity by Stimulating the Cerebellum

IF 5.2 2区 医学 Q2 ENGINEERING, BIOMEDICAL
Huifang Yang;Zhe Zhao;Renhao Xu;Jiamin Pei;Jiaqing Yan;Xiangjian Zhang;Hanna Lu;Yi Yuan
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Abstract

Functional connectivity between the cerebellum and the motor cortex is critical for motor function. Low-intensity transcranial ultrasound stimulation (TUS) has been proved to directly activate cerebellar neural activity. However, whether and how TUS of the cerebellum modulates neural activity in the motor cortex is unclear. In the study, TUS with different parameters was used to stimulate the mouse cerebellar region while local field potentials (LFP) in the cerebellum and the motor cortex were simultaneously recorded, as well as neuronal calcium ion activity. We discovered that: 1) TUS can increase the amplitude and power intensity of LFP in the cerebellum and motor cortex, which linearly increasing with the increase of ultrasound intensity, and nonlinearly increasing with the increase of the duty cycle; 2) TUS in the cerebellum significantly increased the firing time and peak of neurons of the motor cortex, which also increased linearly with the increase of ultrasound intensity and nonlinearly with the increase of duty cycle; 3) The cross-correlation information of the LFP between the cerebellum and motor cortex was enhanced, which depends on ultrasound intensity and duty cycle; 4) TUS in the cerebellum for 7 days improved the motor ability of ischemic stroke mice. Taken together, the above findings indicate that TUS of the cerebellum can modulate the excitability of neural activity in the motor cortex, which is important in modulating the symptoms of motor cortex-related diseases. We also describe the ameliorative effect of TUS of the cerebellum on movement disorders caused by cerebral ischemia.
低强度经颅超声刺激通过刺激小脑调节运动皮质神经活动的兴奋性
小脑和运动皮层之间的功能连接对运动功能至关重要。低强度经颅超声刺激(TUS)已被证实能直接激活小脑神经活动。然而,小脑的TUS是否以及如何调节运动皮层的神经活动尚不清楚。本研究采用不同参数的TUS刺激小鼠小脑区域,同时记录小脑和运动皮层的局部场电位(local field potentials, LFP)以及神经元钙离子活性。我们发现:1)TUS可以增加小脑和运动皮层LFP的振幅和功率强度,其随超声强度的增加呈线性增加,随占空比的增加呈非线性增加;2)小脑TUS显著增加运动皮层神经元的放电时间和峰值,且随超声强度的增加呈线性增加,随占空比的增加呈非线性增加;3)小脑与运动皮质间LFP的相互关联信息增强,这种增强依赖于超声强度和占空比;4)连续7天给药可改善缺血性脑卒中小鼠的运动能力。综上所述,小脑的TUS可以调节运动皮层神经活动的兴奋性,在调节运动皮层相关疾病的症状中起重要作用。我们还描述了小脑TUS对脑缺血引起的运动障碍的改善作用。
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来源期刊
CiteScore
8.60
自引率
8.20%
发文量
479
审稿时长
6-12 weeks
期刊介绍: Rehabilitative and neural aspects of biomedical engineering, including functional electrical stimulation, acoustic dynamics, human performance measurement and analysis, nerve stimulation, electromyography, motor control and stimulation; and hardware and software applications for rehabilitation engineering and assistive devices.
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