ABSTRACT
Muscle is an excitable tissue that responds to neural stimulation by contracting and attempting to shorten within its articular system. The many functions that are served by associated changes to the stiffness or movement of a joint system permit effective and safe interaction with our environment. Any mechanical response is preceded by an asynchronous pattern of neural activation and an electrical response from the muscle fibres. Electromyography (EMG) is a technique for recording the changes in the electrical potential of a muscle when it is caused to contract by a motor nerve impulse.
