ABSTRACT
Robert Matthews Neil J . McDonald Igor Fridman Paul Hervieux Tom Nielsen robm@quasarusa.com neil@quasarusa.com igor@quasarusa.com paul@quasarusa.com tom@quasarusa.com
Quantum Applied Science and Research 5764 Pacific Center Blvd., #107,
San Diego, CA, 92121 (858)373-0321
Abstract The principle technical difficulty in measuring bioelectric signals from the body, such as electroencephalogram (EEG) and electrocardiogram (ECG), lies in establishing good, stable electrical contact to the skin. Traditionally, measurements of human bioelectric activity use resistive contact electrodes, the most widely used of which are ‘paste-on’ (or wet) electrodes. However, the use of wet electrodes is a highly invasive process as some preparation of the skin is necessary in order for the electrode either to adhere to the skin for any length of time or to make adequate electrical contact to the skin. This is uncomfortable for the subject and can lead to considerable irritation of the skin over time, an issue of particular concern in measurements of EEG signals, which typically require an array of electrodes positioned about the head.
