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进行涉及许多肌肉而自由度大的运动时,为控制上肢动作,以经皮肤埋入电极法较优良,因其能对各肌肉进行精确的控制。用脉冲宽度02ms,重复周期50ms 的脉冲电流对神经、肌进行电刺激.通过调制脉冲振幅,控制肌肉的收缩力量。随着振幅的增大,在神经束内兴奋起来的神经纤维群增加,收缩量增大。实际上四肢麻痹患者把上述电极埋入6年以上进行电刺激,不会发生大问题。上肢FES 系统,基本上由呼吸传感器等检出随意信号的传感器及其信号处理电路、微机、A/D及D/A 转换器、隔离器、电极等构成.用呼吸传感器的次数以实施把特种类的选择及刺激的开始、保持、停止、再开始等命令、进行比例控制则再用
When exercising a large amount of freedom involving a large number of muscles, it is preferable to control the movement of the upper extremities by implanting the electrode through the skin, because the muscles can be accurately controlled. The pulse width of 02ms, repeat the cycle of 50ms pulse current nerve, muscle electrical stimulation by modulating the pulse amplitude, muscle contraction force control. With the increase of the amplitude, the nerve fibers excited in the nerve bundle increase, and the amount of contraction increases. In fact, limb paralysis in patients with the above electrodes buried in more than 6 years for electrical stimulation, no major problems occur. The upper extremity FES system basically consists of a sensor that detects a free signal such as a respiration sensor and its signal processing circuit, a microcomputer, an A / D and D / A converter, an isolator, an electrode, etc. The number of respiration sensors Kinds of choices and stimuli to start, keep, stop, restart and other orders for proportional control then reuse