Design Of MENB/MEEB System With Functions Of Electromyography Signal Storage And Replay

Stroke is a main cause of death in the world. With the development of modern medicine, the mortality of stroke is under control, but the rates of disability remains high. Among the disability caused by stroke, limb paralysis accounted for the largest proportion. Suffering from limb paralysis would lose capacity to work and even lose independence. This is a heavy burden on patient’s family as well as the society. However, there are still no effective treatment measures for limb paralysis. For this reason, our group puts forward the idea of microelectronics neural/electromyography bridge(MENB/MEEB) to reconstruct limb movement function. Based on the idea of MENB/MEEB, the contralateral control theory and previous researches, this work developed a system to rebuild the limb movement of hemiplegic patient’s. The system using surface electrodes to detect surface electromyography(sEMG) signal from the non-paretic side. After a series of processing, the sEMG signal would be used to stimulate the paralytic limb to do the same. The system utilizes the healthy limb to control the paralytic limb simultaneously.At the beginning of this paper, the disadvantages of present functional electrical stimulation(FES) system are analysised, and the theoretical basis that this system based on is introduced. After that, the hardware structure and software design of the system are described in details. The hardware includes the power module, the detection circuit, the main control circuit, the peripheral equipments module and the stimulation circuit. In this system, the main control chip is STM32F103VET6, which is based on ARM CortexTM-M3 with a high speed but a low power. Meanwhile, the chip has abundant peripheral interfaces to realize many functions. The software part contains the driven algorithm and the algorithm for signals processing. Besides the whole functions that the electrical stimulation system can provide, including signal storing, playing and parameter setting, the system in this paper realize the healthy limb to control the paralytic limb to do the same. The last part of this paper gives the test result of the system and performances the clinical trials of the previous system.This paper further confirmed the feasibility of MENB/MEEB theory, as well as the effect on patients in clinical trials. The further research will conduct more clinical trials to prove the result of the system and rebuild more and more hemiplegic patient’s limb movement.