Sasha,a researcher,is working on a project on the human brain.Part of her research requires her to place electrodes on the scalps of her subjects to study their brain-wave activity.In this scenario,Sasha is most likely using
A)an electroencephalograph (EEG).
B)positron-emission tomography (PET scan).
C)functional magnetic resonance imaging (fMRI).
D)an echocardiogram (ECG).

Question

Quizplus · Accepted Answer

EEG measures brain-wave activity by placing electrodes on the scalp, which is exactly what Sasha is doing in her research project. PET scans measure brain activity by detecting radioactive tracers, fMRI uses magnetic fields to detect changes in blood oxygenation, and ECG measures heart function. None of these methods are used to directly measure brain-wave activity.

Sasha,a Researcher,is Working on a Project on the Human Brain