Related by context. Frequent words. (Click for all words.) 74 brains 72 frontal lobe 70 cerebellum 69 cerebral cortex 66 cortex 65 neural 64 nerve cells 64 neurons 63 neurological 63 Brain 62 neuron 61 synapses 60 spinal cord 60 prefrontal cortex 59 neuronal 58 cortical 58 hippocampus 58 optic nerve 58 cognitive functions 58 cognitive 57 cognition 56 retina 56 brain scans 56 liver 56 synapse 56 synaptic 56 cognitive abilities 55 blood vessels 55 amygdala 54 retinas 54 pancreas 54 auditory 54 dopamine 53 nerve endings 52 sensory 51 lung 51 nerve fibers 50 internal organs 50 physiological 50 neuro 50 fMRI 50 lungs 50 mitochondria 50 metabolic 50 cognitive function 50 spinal fluid 49 plasticity 49 motor neurons 49 hypothalamus 49 neurotransmitter 49 ovaries 49 cognitively 48 serotonin 48 neurotransmitters 48 hair follicles 48 intestines 48 neuroscientists 48 olfactory 48 inner ear 48 electrical impulses 48 muscle tissue 48 retinal 47 intestine 47 macula 47 circuitry 47 cerebral 47 muscles 47 eardrum 47 metabolism 47 aorta 47 astrocytes 47 thyroid gland 46 cranium 46 esophagus 46 functional magnetic resonance 46 digestive tract 46 glutamate 46 small intestine 46 neuroscientist 46 subconscious 46 perceptual 46 bladder 46 stress hormones 46 pituitary gland 45 myelin 45 inhibitory 45 cornea 45 neurobiology 45 bodily 45 brain tumor 45 ventricles 45 cranial 45 nonverbal 45 axons 45 kidneys 44 nerve 44 degenerative brain 44 neurodegenerative disease 44 reproductive organs 44 bowel 44 tissue