The skull bones and other tissues separating the brain from electrodes can create a problem by blocking
A)the brain's electrical output more than its magnetic output.
B) the brain's magnetic output more than its electrical output.
C) the brain's magnetic and electrical output equally.
D) neither the brain's electrical nor its magnetic output.

Question

The skull bones and other tissues separating the brain from electrodes can create a problem by blocking 
A)the brain's electrical output more than its magnetic output. 
B) the brain's magnetic output more than its electrical output.​ 
C) the brain's magnetic and electrical output equally.​ 
D) neither the brain's electrical nor its magnetic output.​

Quizplus · Accepted Answer

The skull bones and tissues are more effective at blocking electrical signals than magnetic signals, which is why techniques like magnetoencephalography (MEG) can detect brain activity through magnetic fields more effectively than electroencephalography (EEG) can through electrical signals.

The Skull Bones and Other Tissues Separating the Brain from Electrodes