Noraxon Ultium EMG System User Manual page 46

Ultium EMG Hardware User Manual
pressed onto the electrode after the electrode has been applied. It will also prevent the
electrode gel from seeping out. Additionally, this method will prevent unattached leads
from coming into accidental contact with other conductive objects.
5. Electrode application sites may need to be abraded to lower the skin impedance. Fine sand
paper or electrode prep gel, e.g. NuPrep, can be used to abrade the skin.
6. Electrodes are the weak link in the EMG measurement chain. Lack of proper attention to
electrode quality or site preparation is by far the most common cause of inferior
recordings.
7. It may take up to 5 minutes for disposable electrodes to fully stabilize electrically once
applied to the skin. If extremely critical or precise measurements are intended, the
electrodes should be applied several minutes in advance of the recording.
(Rev J)
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