Nox A1 Manual
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Before electrodes are placed it is important to inspect the skin locations and make sure the electrodes
are placed on a dry and clean location that has no abrasions or wounds. To prepare the skin, it is
recommended to clean the skin with water and abrasive skin prepping gel (55 50 10 Nuprep ECG &
EEG Abrasive Skin Prepping Gel). In some cases, if the skin is very oily it can be necessary to use wipes
with alcohol. The electrodes are then applied to the skin by use of suitable gel or paste (Ten20
Conductive EEG Paste) ensuring bio-compatibility and electrical contact.
Measuring EMG/ECG Signals
Warning: Electrodes should only be used by or in consultation with a healthcare
provider familiar with their proper placement and use. Not using and placing the
electrodes correctly may affect recording of data, and therefore interpretation and
diagnostic.
Warning: The electrodes should be applied only to intact, clean skin (e.g. not over
open wounds, lesions, infected or inflamed areas) to prevent infections.
Warning: Make sure the conductive parts of electrodes and associated connectors,
including the neutral electrode, do not contact other conductive parts including
earth to prevent potential serious harm to the operator/patient.
The Nox A1 recorder is equipped with 4 bipolar channels suitable for recording of ECG and EMG
signals such as leg EMG or masseter EMG for bruxism detection. The bipolar channels are labeled with
GP1, ECG, LM1, and LM2 and connect to bipolar electrode leads with keyhole connectors. However,
during recording setup, those channels can be defined for any EMG/ECG signals. Please refer to the
Noxturnal manual for more information on how to configure the Nox A1 recorder.
The figure below shows connections for ECG, EMG on right leg and EMG on left leg. When not using
the Nox EEG head cable you can connect your ground electrode to the PGND input on the device.
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