Related by context. Frequent words. (Click for all words.) 79 dopamine 73 neurotransmitter 72 serotonin 72 neurotransmitters 68 Dopamine 67 norepinephrine 67 acetylcholine 65 stress hormones 65 glutamate 61 nucleus accumbens 61 hypothalamus 61 cortisol 61 endorphins 60 GABA 60 stress hormone cortisol 58 leptin 58 melatonin 58 endorphin 58 Serotonin 58 ghrelin 57 BDNF 57 oxytocin 57 striatum 56 adenosine 55 SIRT1 55 histamine 55 nitric oxide 55 hormone 55 thyroid hormone 54 prolactin 54 nerve cells 54 neurons 54 signaling molecules 53 hormone estrogen 53 receptors 53 prostaglandins 53 satiety 53 cytokines 53 vagus nerve 52 neurones 52 Leptin 52 basal ganglia 52 inhibitory 52 hippocampus 52 dopamine producing 52 insula 52 hormones 51 neurogenesis 51 estrogen 51 reactive oxygen species 51 Melatonin 51 brain circuitry 51 digestive enzymes 51 amygdala 51 insulin secretion 51 glial cells 50 receptor 50 synaptic 50 prefrontal cortex 50 ion channels 50 thalamus 50 secretion 50 protein 50 adrenal glands 50 enzyme 50 amyloid beta 50 adiponectin 50 cannabinoid 50 androgens 50 cytokine 50 cortisol levels 50 nerve impulses 49 neural circuits 49 sebum 49 impulsivity 49 signaling pathway 49 neural pathways 49 fatty acids 49 autonomic nervous system 48 nicotine 48 neuron 48 cognitive functions 48 cortex 48 synapses 48 interleukin 48 metabolism 48 glucocorticoids 48 astrocytes 48 male hormone testosterone 48 tryptophan 48 GDNF 47 TGF beta 47 uric acid 47 glucose metabolism 47 nerve fibers 47 anti oxidants 47 factor VEGF 47 pheromones 47 amyloid plaques 47 frontal cortex 47 impulsive behavior