Question

what is a disadvantage of using electroencephalograph to study the human brain?
o a. it requires the patient to be exposed to radioactivity.
o b. it does not detect rapid changes in electrical activity.
o c. it only provides recordings of brain activity in select areas.
o d. it uses electrodes that are pasted on the outside of the head.

Explanation:

Electroencephalograph (EEG) records electrical activity on the scalp. It only gives recordings from select areas of the brain surface. It doesn't require exposure to radioactivity, can detect rapid electrical changes, and using surface - pasted electrodes is an advantage for non - invasiveness.

Answer:

C. It only provides recordings of brain activity in select areas.