What are dry electrodes?

Dry electrodes consist of a single metal that acts as a conductor between the skin and the electrode. This material is usually stainless steel.

What is dry EEG?

Dry electrode electroencephalogram (EEG) recording combined with wireless data transmission offers an alternative tool to conventional wet electrode EEG systems. However, the question remains whether the signal quality of dry electrode recordings is comparable to wet electrode recordings in the clinical context.

What are dry EEG electrodes made of?

More in detail, EEG electrodes are produced with the shape of a cup, disc or needle, and are usually made of silver (Ag) and silver chloride (AgCl) [29].

Are ECG leads waterproof?

However, the current electrodes used for ECGs are not suitable for aquatic applications since they may lose their adhesiveness to skin, stable conductivity, or/and structural stability when immersed into water.

What is the difference between wet and dry electrodes?

Wet EEG electrodes may provide better quality EEG signals for short duration. As the gel dries up, motion artifacts and high contact impedance may deteriorate the signal further. Thus if stability is preferred over quality, dry EEG electrodes are better.

What is an inactive electrode?

Inactive/ Inert electrodes are electrodes which transfer electrons rather than exchanging ions with the aqueous solution in which they are immersed. They does not take part in any chemical reaction.

Is electrode gel necessary for EEG?

Commercial electrodes require the application of a conducting gel on the skin and this hinders long-term recordings: The gel is water-based and becomes dry after a few hours, which severely degrades the quality of the recordings.

Which type of electrode is used in EEG?

The EEG electrodes are manufactured in several types, including disposable electrodes, reusable electrodes, headbands or caps, and needle electrodes. Spikes and strong wave fluxuations noted during an EEG analysis may reflect seizure activity in cases of epilepsy.

Can electrodes get wet?

What is the difference between active and inactive electrodes?

Active vs Inert Electrodes Active electrode is the electrode that actively takes part in the chemical reaction of the electrochemical cell. Inert electrode is an electrode that does not participate in the chemical reaction.