Using surface electromyography in physiotherapy research

Electromyography can be a useful tool for the physiotherapist to obtain information about the timing or magnitude of muscle activity when investigating the neuromuscular reflexes, muscle performance or patterns of movement. The quality of the signal recorded is dependent on the correct siting of electrodes, adequate skin preparation and the characteristics of the EMG machine itself. In order to accurately interpret the EMG data the user must be able to recognize artefacts which may distort the recording, and must also choose a processing technique which is appropriate for the particular application. This paper will review all these areas and provide an introduction to EMG techniques for the intending user.