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The human movement laboratory

Electromyography (EMG)

Surface EMG records the voltage present in the tissue underneath the recording electrodes, which will include the voltage produced by the action potential passing along the nerve and muscle fibres of the active muscle. Our EMG system has the potential to record 8 channels of data and can also record input from other devices such as switches, trace markers and Electrogoniometers. The EMG data can be analysed to measure:

  • the magnitude of the voltage produced (which is related to the level of activity of the muscle)
  • the timing of onset or cessation of muscle activity, (which can be used to look at the coordination of muscle activity)
  • the mean or median frequencies contained within the EMG signal (which gives an indication of the level of fatigue in the muscle)

Technical

Biometrics DLK900 system (Biometrics Ltd, Gwent, UK)

SYSTEM SPECIFICATIONS
Hardware:
Input impedance – 1015 ohms
CMMR – 110dB
Sampling frequency – up to 5000Hz

Software:
Biometrics Datalink Software Version 7.5
Matlab Data Processing Software Version R2010b
The Biometrics system is also the operating system for the electrogoniometers

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Electromyography (EMG)
Electromyography (EMG)