What does function MRI do?

Images activity. Of activity of portions of the brain during certain activities.
Functional mri fmri. Is complicated. It looks at the blood flow to your brain during various segmented repeated activities like tapping your fingers or looking at a optical maze. But it can also include diffusion tensor imaging, proton spectroscopy and other images. www.medscape.org/viewarticle/776272 discusses some of the new imaging MRI techniques for brain tumors.