Question

Which among the following electrode gives high skin impedance as compared to ECG?

(a) VCG

(b) EEG

(c) EMG

(d) PCG

Answer 1

Right option is (b) EEG

To explain: EEG electrodes give high skin contact impedance as compared to ECG electrodes. Good electrode impedance should be generally below 5 kilohms. Impedance between a pair of electrodes must also be balanced or the difference between them should be less than 2 kilohms.