Question

The peak to peak amplitude of the waves that can be picked from the scalp is ______________

(a) 100mV

(b) 100V

(c) 100uV

(d) 10mV

I have been asked this question in a job interview.

This intriguing question comes from Electrodes for EEG in division Bioelectric Signal and Electrodes of Biomedical Instrumentation

Answer 1

Correct option is (c) 100uV

Best explanation: The EEG signal can be picked up with electrodes either from the scalp or directly from the cerebral cortex. The peak to peak amplitude of the waves that can be picked up from the scalp is normally 100uV. The frequency varies greatly with different behavioral states.