Related by context. Frequent words. (Click for all words.) 78 cerebral cortex 77 cortical 75 visual cortex 72 cerebellum 72 prefrontal cortex 72 hippocampus 70 temporal lobe 68 frontal lobe 68 neurons 68 thalamus 68 brainstem 68 amygdala 67 neuron 67 frontal lobes 66 brain 66 synapses 65 brain circuitry 64 neural 64 synapse 64 hypothalamus 63 nerve cells 63 striatum 63 synaptic 61 insula 61 neuronal 61 nerve fibers 61 neurones 58 cochlea 57 brains 57 cognition 57 auditory 56 inhibitory 56 dopamine 56 axon 56 axons 56 olfactory 56 neurotransmitter 55 cognitive functions 55 nerve endings 55 dermis 55 BDNF 54 glutamate 54 neurogenesis 54 epithelium 54 receptors 53 Neurons 53 astrocytes 53 photoreceptors 53 retina 53 optic nerve 52 macula 52 circuitry 52 sensory 52 dorsal 52 cognitive 52 myelin 51 plasticity 51 acetylcholine 51 neurotransmitters 51 perceptual 51 epidermis 51 REM sleep 51 dendrites 51 neural networks 50 serotonin 50 hair follicles 50 salivary glands 50 follicles 50 testis 50 cilia 50 fatty tissue 49 electrical impulses 49 mitochondria 49 Brain scans 49 phenotype 49 motor neurons 49 glucose metabolism 49 receptor 49 cognitive functioning 49 retinas 48 sweat glands 48 vasculature 48 gene expression 48 excitation 48 blood vessels 48 nasal cavity 48 secretion 48 testes 48 leptin 48 fMRI 48 lobe 48 beta amyloid 48 SIRT1 48 ion channels 48 amyloid plaques 48 electrical pulses 47 ghrelin 47 imaging fMRI 47 adrenal gland 47 amyloid beta 47 nerve impulses