Related by context. Frequent words. (Click for all words.) 73 neurotransmitter dopamine 72 neurotransmitters 70 chemical messengers 70 chemical dopamine 70 neurotransmitter 69 dopamine 68 cortisol 68 serotonin 67 vasopressin 67 stress hormones 66 chemical serotonin 65 dopamine receptors 65 Cortisol 64 norepinephrine 64 glutamate 63 orexin 63 endorphins 63 acetylcholine 63 Dopamine 63 calcium ions 62 excitatory 62 steroid hormones 62 signaling molecules 61 neurochemical 61 hypothalamus 61 NMDA receptors 61 thyroid hormones 61 endorphin 61 hormones 60 glucocorticoid 60 prostaglandins 60 autonomic nervous system 59 neurones 59 neuronal activity 59 NPY 59 stress hormone cortisol 59 prolactin 59 neurons 59 neural pathways 59 leptin 59 female hormone estrogen 59 skeletal muscles 58 dopamine neurons 58 aldosterone 58 BDNF 58 ion channels 58 inhibitory 58 dopaminergic 58 neuroendocrine 58 hormonal 58 Serotonin 58 retinoic acid 58 nerve cells 58 inflammatory cytokines 57 nerve impulses 57 adenosine 57 oxytocin 57 Oxytocin 57 cAMP 57 receptors 57 signaling molecule 57 thyroid hormone 57 glutamine 57 metabolic processes 56 physiological 56 hormone 56 GABA 56 dysregulation 56 ghrelin 56 nitric oxide 56 brain circuitry 56 physiologic 56 NMDA receptor 56 neuron 55 cytokines 55 synaptic 55 biochemical processes 55 adiponectin 55 pharmacologically 55 neural circuits 55 hormone insulin 55 histamine 55 inflammatory mediators 55 ceramide 55 hormone estrogen 54 pheromones 54 androgens 54 sensory input 54 limbic system 54 superoxide 54 lipids 54 sebum 54 biochemical reactions 54 external stimuli 54 MMPs 54 secretion 54 striatum 54 adrenal glands 54 stimuli 54 Nitric oxide 54 estrogen