Related by context. Frequent words. (Click for all words.) 68 physiological 57 autonomic nervous system 56 physiologic 55 metabolic 55 neuronal activity 54 arousal 54 external stimuli 53 physiologically 53 neurochemical 52 biochemical 52 stress hormones 52 stimuli 52 cognition 52 imaging fMRI 51 respiration 51 reactivity 51 cortisol levels 50 brainwaves 50 fMRI 50 functional magnetic resonance 50 behaviors 50 visual stimuli 50 physiology 49 neural 49 cognitive functions 49 cortisol 49 sexual arousal 49 glucose metabolism 49 biochemical pathways 48 muscle contractions 48 brain scans 48 sensory 48 dopamine neurons 48 neuroendocrine 48 stress hormone cortisol 48 cognitive 47 neural circuits 47 dysregulation 47 oxidative stress 47 skeletal muscles 47 auditory 47 satiety 47 ghrelin 47 gene expression 47 inflammatory markers 46 somatic 46 Brain scans 46 Physiological 46 brain circuitry 46 oxygen saturation 46 intensities 46 Cortisol 46 neurocognitive 46 stimulation 46 neurobiological 46 neural pathways 46 glucose tolerance 46 stressors 46 attentional 45 cognitive functioning 45 sleep disturbances 45 circadian rhythms 45 electrocardiogram ECG 45 cognitive function 45 olfactory 45 arrhythmias 45 phenotypes 45 limbic system 45 gene expression patterns 45 insulin secretion 45 metabolism 45 serotonin 45 vocalizations 45 airway inflammation 45 temperature humidity 45 cognitive abilities 45 electrical currents 45 perceptual 45 immune responses 45 circadian 44 metabolic processes 44 noninvasively 44 systemic inflammation 44 pharmacologically 44 abnormalities 44 hormonal 44 dopamine 44 hypoxia 44 neurones 44 metabolisms 44 visual cues 44 adiponectin 44 caloric restriction 44 signaling molecules 44 stressful situations 44 sleepiness 44 endothelial function 44 skeletal muscle 44 metabolites 44 neurons 44 cognitive deficits