The fMRI technique makes use of activity - dependent changes in:
A) blood oxygen levels.
B) radioactive decay.
C) glucose accumulation.
D) myelin density.

Question

Quizplus · Accepted Answer

fMRI technique makes use of changes in blood oxygen levels, known as the blood oxygenation level dependent (BOLD) signal, which is a measure of neural activity. As neurons become active, they require more oxygen, leading to increased blood flow to the area. This increased blood flow results in an increase in the concentration of oxygenated hemoglobin in the blood, while the concentration of deoxygenated hemoglobin decreases. fMRI detects these changes in blood oxygenation levels and translates them into images of brain activity.

The FMRI Technique Makes Use of Activity - Dependent Changes