Question

The electrode gel is used to _________

(a) reduce skin resistance

(b) increase skin resistance

(c) moisturize the skin

(d) cause skin flaking

I got this question in unit test.

I would like to ask this question from Electroencephalography topic in division Diagnostic Investigation in Neurology and Cardiology of Clinical Science

Answer 1

The correct option is (a) reduce skin resistance

To elaborate: The electrodes that acquire the signal can cause damage to the skin as well. This is because while acquiring the signal, there is heat production which can cause burning if the signal acquisition is of a long duration. Thus, the electrode gel is used to reduce the skin resistance so that prolonged signal acquisition can take place.