- The functional magnetic resonance imaging (fMRI) component will not be performed in subjects that had medical interventions with any device likely to be damaged or moved from its place, at any moment during the fMRI scanning procedure (including cerebral coils or clips, heart pacemakers or defibrillators, heart valve prosthesis, medicine infusion pumps, inner ear implants, neural stimulators, brain shunts, joint replacements/ large metal implants, stents in the heart or arteries, some implants, or some intra-uterine contraceptive devices.