Analysis Of Eeg Power Spectrum And Complexity Before And After 1/f-Wave Electrical Stimulation

The application of electrical stimulation in the treatment of diseases of the nervous system has been very common. The current commonly used main treatment methods are deep brain stimulation, vagus nerve stimulation, Transcranial magnetic stimulation and transcutaneous electrical nerve stimulation. These methods are by changing the pulse shape and amplitude for therapeutic purposes, but these pulse waveform and amplitude are fixed, human brain after prolonged repeated stimulation, the brain gradually adapt to electrical pulse stimulation, resulting in decreased therapeutic effect, in response to this situation, this paper designed a 1/f-wave stimulator.1/f-wave electrical pulse is random changes in signal, with the quiet stream gurgling water, and gently hit the breeze of change in the law, as well as the changes in rhythm anastomosis of the biological signals, when a-brain waves and heart rate cycle are in quiet or pleasant, in the treatment of nervous system disease has good prospects for development.The 1/f-wave electrical pulse Stimuluses specific parts of the cerebral cortex of patients who are insomnia, anxiety, depression, neurasthenia, and in order to achieve the purpose of restoring the biological effects of human nervous system of sleep, sedation, anxiety, antidepressants.In hardware design, micropower and portable are the main design considerations. 1/f-wave electrical stimulation system hardware mainly compose by the 51 SCM P89C58BP, ADC0809 and integrated op-amp composition, which has a simple structure, low cost, small size, easy to carry and other characteristics; EEG data collection transfer part is made up of the USB-based MCU C8051F320, micro-power microcontroller MSP430F149 and the amplifier. According to the ultra-low power features of MSP430F149 MCU, using its high-precision 12-bit A/D converter captures 2-way 1/f-wave electric stimulation before and after the EEG, and at the same time storage and transmission. C8051F320 builted-in USB controller, so the hardware circuit design simple and fast data transfer can be achieved. Programming languages are developed with MCU C51.EEG power spectral characteristics and mental fatigue have a close relationship between the degree, can sensitively reflect the changes in mental fatigue. Analyzing the power spectrum of the before and after Stimulating EEG shows that 1/f-wave electrical stimulation largely alleviates the patient's mental state. The complexity reflects the brain at different load condition of the activities from the angle of the brain to receive and handle the amount of information. Analyzing the complexity measure of pre and post stimulating EEG, then strike the approximate entropy. As the approximate entropy in stimulating pre and post significant differences, indicating that 1/f-wave electrical stimulation of the brain can become active chaotic and enhance the brain's thinking, jumping to promote brain activity. Thus, 1/f-wave electrical stimulation in the treatment of nervous system diseases, which can alleviate insomnia, anxiety, depression, neurasthenia, and have good results.