Small metal disks are pasted onto Ruby's scalp, and they are connected by wire to a machine that translates the electrical energy from her brain into wavy lines on a moving piece of paper. From this description, it is evident that Ruby's brain is being studied through the use of __________.
A) a CT scan
B) functional magnetic resonance imaging (fMRI)
C) a microelectrode
D) an electroencephalogram (EEG)

Question

Quizplus · Accepted Answer

The small metal disks and wires connected to a machine that translates electrical activity from the brain into wavy lines on a piece of paper suggest that Ruby is having an EEG. CT scan and fMRI involve different types of imaging techniques, while microelectrodes involve insertion of tiny electrodes into the brain tissue.

Small Metal Disks Are Pasted onto Ruby's Scalp, and They