The functional magnetic resonance imaging (fMRI) technique measures changes in ________ to image brain metabolic activity.
A) GABA
B) x-ray diffraction
C) blood oxygen level
D) magnetic waves
E) glucose levels

Question

Quizplus · Accepted Answer

fMRI measures changes in blood oxygen level in order to image brain metabolic activity. When a certain area of the brain becomes more active, it requires more oxygenated blood flow to support increased metabolic demands. This increase in blood flow leads to an increase in the concentration of oxygenated hemoglobin, which can be detected by the fMRI scanner. By tracking these changes in blood oxygen level over time, fMRI can provide a real-time picture of which areas of the brain are active during different types of tasks or stimuli.

The Functional Magnetic Resonance Imaging (FMRI) Technique Measures Changes in ________