Design and Implementation of Emg Triggered - Stimulator to Activate the Muscle Activity of Paralyzed Patients

1. ABSTRACT: A simple Electrical stimulator is used to give the current stimulations to the muscle of paralyzed patients manually by the doctor during treatment of paralysis. We proposed the Electromyogram (EMG) triggered stimulator which is used for paralyzed patients to activate their muscle activity and relearn the lower limb movements. The different time domain features are extracted using MATLAB Tool from the EMG signal to study the muscle contraction level and contraction force applied on the muscle. The innovation consists in using EMG sensor for sensing electrical signal from a thigh muscle that is action potential which is used as Triggered EMG level to drive the stimulator.Hence when patient thinks or tries to the lower limb movement the triggered EMG level is generated and when it reaches above threshold level stimulations are given. We used microcontroller as PWM generator to apply stimulations of fixed frequency which stimulates the muscle.