Researchers monitor changes in blood oxygen level when they record brain activity using:
A) an EEG recording
B) a PET scan
C) transcranial magnetic stimulation
D) fMRI

Question

Quizplus · Accepted Answer

fMRI (functional magnetic resonance imaging) records changes in blood oxygenation in the brain as a measure of neural activity. This makes it an effective tool for studying brain function and mapping brain activity during different tasks. EEG (choice A) records electrical activity in the brain, but does not directly measure changes in blood oxygenation. PET scans (choice B) do measure changes in blood flow and oxygenation, but involve the injection of radioactive tracers which can be uncomfortable for participants and limit the number of scans that can be performed. Transcranial magnetic stimulation (choice C) uses magnetic fields to stimulate or inhibit neural activity, but does not involve measuring changes in blood oxygenation.

Researchers Monitor Changes in Blood Oxygen Level When They Record