Related by context. Frequent words. (Click for all words.) 58 fMRI scans 57 MRI scanner 56 fMRI 56 electrodes attached 55 EEGs 55 functional magnetic resonance 54 imaging fMRI 52 brain scans 49 electroencephalogram 49 magnetic pulses 48 electrodes implanted 48 electrodes 48 neuropsychological tests 46 polysomnography 45 electrophysiological 44 physiological responses 44 brainwaves 44 oxygen uptake 44 electrical stimulation 43 cortisol levels 43 X ray beam 43 visual stimuli 43 inactive placebo 42 MRI scans 42 Brain scans 42 simulating 42 ergometer 42 dosimeter 42 speculum 41 infrared beam 41 VO2 max 41 simulate 41 scanning tunneling microscope 41 wakeful 40 erect penis 40 laparoscope 40 blindfolds 40 PET scans 40 stopwatch 40 parietal cortex 40 EEG 40 manikin 40 optical microscope 40 stopwatches 39 treadmill 39 positron emission tomography 39 auditory cortex 39 diffusion tensor imaging 39 optical illusions 39 poked prodded 39 METs 39 positron emission tomography PET 39 macaque monkeys 39 neuroscientists 39 gurney 39 researchers 39 stationary bikes 39 interactively 39 rTMS 39 metal detecting wands 39 x ray machine 39 motor cortex 39 ventral striatum 39 verbal cues 39 MRI magnetic resonance 39 stretchers 39 neurophysiological 39 sensory nerves 38 electrocardiogram ECG 38 varying distances 38 stimuli 38 attentional 38 simulated 38 digital readout 38 electrical pulses 38 pretest 38 visual cortex 38 genetically altered mice 38 electrode 38 sleep deprivation 38 mirror neurons 38 stationary bicycle 38 overhead projector 38 motivational interviewing 38 biofeedback 38 unmedicated 38 anesthetized 38 eyepiece 38 orbitofrontal cortex 38 infrared rays 38 sensory input 38 visualizing 38 fluorescent dye 38 oxygen saturation 38 blindfolded 38 cuing 38 resting metabolic 38 Electrodes 38 infrared spectrometer 38 Positron Emission Tomography PET 37 electrocardiograms