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Voltage difference between an active electrode on the scalp with respect to reference electrode at ear lobe or any other part of body is known as ___________ recording.

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Voltage difference between an active electrode on the scalp with respect to reference electrode at ear lobe or any other part of body is known as ___________ recording.

(a) Monopolar

(b) Bipolar

(c) Unipolar

(d) Nonpolar

This question was addressed to me in homework.

Origin of the question is Measurement of Heart Rate in chapter Patient Monitoring System of Biomedical Instrumentation

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The correct option is (a) Monopolar

Explanation: EEG may be recorded by picking up the voltage difference between an active electrode on the scalp with respect to a reference electrode on the ear lobe or any other part of the body. This type of recording is called ‘monopolar’ recording.

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