Week 1

Do some research about what is exactly EMG. The basic function of the machine, how to use the machine, the procedure, the results whether normal or abnormal and etc.


EMG (Electromyography) is used for recording the electrical activity of the muscles when these cells contract and also when the cells are at rest. EMG can be measured by applying conductive elements or electrodes to the skin surface, or invasive within the muscle. Electromyography is a test that measures and records the activity of contracting muscles in response to electrical stimulation. It checks the health of the muscles and the nerves that control the muscles. EMG is performed using an instrument called electromyogaph, to produce a record called an electromyogram.


Measuring and accurately representing the EMG signal depends on the properties of the electrodes and their interaction with the skin, amplifier design, and the conversion and subsequent storage of the EMG signal from analog to digital form. 

The quality of the measured EMG is often described by the ratio between the measured EMG signal and unwanted noise contributions from the environment. The goal is to maximize the amplitude of the signal while minimizing the noise. 

Figure 1 : EMG Machine