EMS Physio

EMG biofeedback

Electromyography (EMG) is the recording and study of the electrical changes associated with muscle activity. These electrical signals may vary from a few microvolts to one or two millivolts. The magnitude of the electrical signal increases as the muscle contracts and decreases as it relaxes. The EMG can, therefore, provide information about the current state of the muscle.

EMS Physio equipment detects and amplifies the electrical signals from the muscles and displays them in graphic and numeric form. By observing the displayed EMG the patient can learn to control the muscle activity. Biofeedback is the process where the patient observes data acquired, in this case an EMG, to control the bodily function which produces that data, in this case the muscle activity.

EMG biofeedback has two main applications. The first is the control of muscle activity or movement. In some applications biofeedback may be used to enable patients to perform an activity which they find difficult to do at will.

Secondly, EMG biofeedback has also been used for control of stress related conditions such as tension headache or migraine. In these applications the patient is encouraged to relax and obtain a minimum EMG.