【摘要】 体感振动能够刺激人的体表感觉区,这种刺激传输到躯体感觉神经,进而影响大脑皮层中央后回及中央旁小叶后部的躯体感觉中枢,从而改变大脑功能状态。本研究旨在通过脑电检测方法,研究体感振动对大脑功能状态的影响。分别对12名受试者进行了20Hz体感振动刺激实验,采用相对功率变化率、Lempel-Ziv复杂度和基于互信息的脑网络等方法。结果发现,20Hz振动使得左前额区及左前颞区的脑电信号产生频率跟随响应;而脑网络分析表明:20Hz体感振动刺激使大脑右半脑区的额叶、中央叶、顶叶、颞叶、枕叶之间的信息流传递加强,大脑皮层趋于兴奋。因此,利用20Hz体感振动刺激调节大脑功能状态具有一定可行性。更多还原

【Abstract】 Somatosensory vibration can stimulate somatosensory area of human body,and this stimulation is tranferred to somatosensory nerves,and influences the somatic cortex,which is on post-central gyrus and paracentral lobule posterior of cerebral cortex,so that it alters the functional status of brain.The aim of the present study was to investigate the neural mechanism of brain state induced by somatosensory vibration.Twelve subjects were involved in the 20 Hz vibration stimulation test.Linear and nonlinear methods,such as relative change of relative power(RRP),Lempel-Ziv complexity(LZC)and brain network based on cross mutual information(CMI),were applied to discuss the change of brain under somatosensory vibration stimulation.The experimental results showed the frequency following response(FFR)by RRP of spontaneous electroencephalogram(EEG)in 20 Hz vibration,and no obvious change by LZC.The information transmission among various cortical areas enhanced under 20 Hz vibration stimulation.Therefore,20 Hz somatosensory vibration may be able to adjust the functional status of brain.更多还原