A clean, well-glued gold cup electrode on the skin surface of a subject that is not moving, when connected to a pre-amplifier with good quality, can provide an EEG signal that is relatively clean. These signals can then be analyzed to show discernible delta, theta, alpha and beta oscillations. Passive EEG technology was for a long time the cheapest and most cost effective way to collect brain activity, even for extensive use in polysomnography (PSG).
One of the key components of a quality passive electrode is the paste used to stick the electrode to the subject's head. Electrode glue can be the difference between getting a clear signal and a contaminated data. Contaminants can come from the paste or the way it is applied.
There are a number of different types of conductive and adhesive electrode pastes on the market. Some of these pastes are reusable and can be cleaned between subjects. Some electrodes are disposable and must be thrown away after each use. In many laboratories, the choice between reusable and disposable electrodes is based upon the preference of the technician.
In this article we will be reviewing a reusable paste, The Weaver And Company Ten20 Conductive EEG Paste, which is used to hold on non-disposable neuro-diagnostic surface electrodes. This paste has been formulated to have the ideal balance of adhesiveness and conductivity that expert technologists rely on for high-quality results. It also has the ability to wash away with water, which can be a huge benefit when it comes to the time and expense of disrupting a test to re-apply an electrode.
Ten20 by Weaver And Company can be used to clean traditional gold and silver cup electrodes. It is the preferred paste for leading technologists in the world due to its balance between adhesion and conductive properties. It is also very effective in reducing the frequency of electrode pops, which can occur during testing. This allows the technician to continue the test without interruption.
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