Related by context. Frequent words. (Click for all words.) 53 brainwaves 52 fMRI 49 polysomnography 49 electrocardiogram ECG 48 ECG 48 electrophysiological 48 electrodes attached 47 neurophysiological 44 electrodes implanted 44 functional magnetic resonance 44 electrodes 44 brain scans 43 ECGs 43 imaging fMRI 43 MRI scanner 43 physiological responses 42 neuronal activity 41 neuropsychological testing 41 auditory 41 Auditory 41 REM sleep 41 brainwave 41 rTMS 41 neuropsychological 41 neurofeedback 41 cognition 41 electrocardiogram 41 wakefulness 41 Renewable Energy Sources 40 electrocardiograms 40 pulse oximeter 40 positron emission tomography PET 40 auditory cortex 40 neuroimaging 40 single photon emission 40 positron emission tomography 40 attentional 40 Electrodes 40 neural networks 40 MRI scans 40 neurostimulator 39 respiration 39 oxygen saturation 39 physiological 39 motor cortex 39 stimulator 38 spirometry 38 echocardiographic 38 apnea 38 circadian 38 NIRS 38 visual stimuli 38 stimuli 38 cortical 38 psychomotor 38 EMG 38 PET scans 38 electrical stimulation 37 sonographic 37 physiologic 37 PET scanner 37 neuropsychological tests 37 amplitudes 37 cerebellar 37 voxel 37 Fluorescence 37 stimulation 37 ultrasound 37 DXA 37 autonomic nervous system 37 neurobehavioral 37 neural 37 sensory input 37 symptom severity 37 ultrasonography 37 mass spectroscopy 37 PANSS 37 pulsations 37 neurophysiology 36 sine wave 36 Renewable Energies 36 neurocognitive 36 Cortisol 36 hippocampal 36 perfusion 36 noninvasively 36 PET scan 36 FRET 36 Doppler 36 nerve stimulation 36 waveform 36 cortisol levels 36 biofeedback 36 Echocardiography 36 pulmonary function 36 echocardiogram 36 electrical currents 36 echocardiography 36 electroconvulsive therapy 36 cortex 36 tomography