Related by context. Frequent words. (Click for all words.) 67 synapses 67 brain circuitry 64 neurons 63 neural 62 neurones 62 nerve cells 61 synapse 61 visual cortex 60 brain 60 cortex 59 plasticity 58 synaptic 58 neurotransmitters 56 pathways 56 cognition 56 neural networks 56 neurogenesis 56 neuronal 56 hippocampus 55 cerebellum 55 neuron 55 brains 55 brainstem 55 cognitive functions 55 cortical 54 nerve impulses 54 metabolic pathways 54 molecular mechanism 54 serotonin 54 cerebral cortex 54 neurotransmitter 53 physiological 53 cognitive 53 temporal lobe 53 frontal lobe 53 dopamine 53 signaling pathways 52 neuroscientists 52 nerve fibers 52 cognitive abilities 52 BDNF 52 cognitive deficits 52 signaling molecules 52 Neurons 52 circadian rhythms 52 prefrontal cortex 52 neurobiological 52 vagus nerve 52 receptors 52 acetylcholine 51 perceptual 51 biological pathways 51 inhibitory 51 sensory 51 ion channels 51 Brain scans 51 frontal lobes 51 auditory 51 subconscious mind 51 motor neurons 50 cilia 50 neurobiology 50 stimuli 50 genes 50 stress hormones 50 striatum 50 signaling pathway 50 glutamate 50 olfactory 49 molecular mechanisms 49 SIRT1 49 physiologically 49 thalamus 49 nerve endings 49 facial muscles 49 mutant mice 49 photoreceptors 49 dendrites 49 Neuroscientists 48 hypothalamus 48 transcription factors 48 motor cortex 48 circadian 48 wakefulness 48 cochlea 48 circuitry 48 insula 48 proteins 48 brainwaves 48 blood vessels 48 norepinephrine 48 peripheral nerves 47 circadian rhythm 47 cytoskeleton 47 electrical impulses 47 cognitive functioning 47 REM sleep 47 axon 47 glucose metabolism 47 physiologic 47 amygdala