Which of the following principles underlies the technique of functional magnetic resonance imaging (fMRI)?
A)It rests on the principle that mental activity is associated with changes in glucose levels in the brain.
B)It rests on the principle that mental activity is associated with changes in the oxygenated blood levels in the brain.
C)It rests on the principle that mental activity is associated with changes in hydrogenated blood levels in the brain.
D)It rests on the principle that mental activity is associated with changes in magnetic fields in the brain.

Question

Quizplus · Accepted Answer

Functional magnetic resonance imaging (fMRI) works based on the principle that mental activity is associated with changes in the oxygenated blood levels in the brain. When a certain area of the brain is active, it requires more oxygen to meet the energy demands, which leads to an increase in the blood flow and oxygenation in that region. fMRI measures this change in blood flow and oxygen levels to create an image of brain activity.

Which of the Following Principles Underlies the Technique of Functional