Related by context. Frequent words. (Click for all words.) 74 brainstem 72 cortex 72 frontal lobe 71 cerebral cortex 70 brain 69 temporal lobe 68 frontal lobes 67 hippocampus 67 visual cortex 67 prefrontal cortex 65 thalamus 64 cortical 61 neurons 61 nerve cells 61 hypothalamus 60 synapses 60 synaptic 60 striatum 60 neuronal 60 optic nerve 60 neural 59 amygdala 59 adrenal gland 59 brain circuitry 58 neuron 58 synapse 58 neurones 57 inhibitory 56 cochlea 55 nerve endings 55 pituitary gland 55 axon 55 neurotransmitter 55 spinal cord 55 axons 54 epithelium 54 nerve fibers 54 dorsal 54 neurogenesis 54 macula 54 insula 53 brains 53 glial cells 53 testis 53 dopamine 53 neurotransmitters 53 pituitary 53 mitochondria 53 salivary glands 52 cognition 52 dendrites 52 cilia 52 retina 52 vagus nerve 52 cognitive functions 52 plasticity 52 blood vessels 52 auditory 51 serotonin 51 adrenal glands 51 fatty tissue 51 glutamate 51 gland 51 ventricles 51 pancreas 51 lobes 51 lobe 51 glucose metabolism 50 astrocytes 50 motor neurons 50 cognitive 50 testes 50 nasal cavity 50 inner ear 50 BDNF 49 adrenal 49 Neurons 49 acetylcholine 49 cognitive abilities 49 vasculature 49 malformation 49 signaling molecules 49 motility 48 thyroid gland 48 facial muscles 48 norepinephrine 48 extracellular 48 secretion 48 hair follicles 48 epidermis 48 cerebrospinal fluid 48 neurodegeneration 48 nerve impulses 48 spinal column 48 signaling pathways 48 reproductive organs 48 small intestine 48 midline 48 nuclei 48 microtubules 47 left ventricle