A device that measures electrical activity in the brain over time by the means of recording electrodes attached to the surface of the skin is
A) a CT scan.
B) electroencephalograph.
C) an MRI.
D) a fMRI.

Question

Quizplus · Accepted Answer

An electroencephalograph (EEG) is a device that measures electrical activity in the brain over time by recording electrodes attached to the scalp. CT scans, MRIs, and fMRIs are all imaging techniques that show the structure of the brain, but do not measure its electrical activity.

A Device That Measures Electrical Activity in the Brain Over