Related by context. Frequent words. (Click for all words.) 65 photoreceptor cells 64 rhodopsin 64 photoreceptors 64 sensory neurons 64 neurones 64 neurons 64 sensory nerves 63 retinal cells 63 photoreceptor 62 visual cortex 61 neuron 61 Nerve cells 61 astrocyte 60 nerve cells 60 dopaminergic neurons 59 neural tissue 59 auditory nerve 59 receptor protein 58 trigeminal nerve 58 dendritic spines 58 excitatory 58 neuronal activity 58 midbrain 58 parietal cortex 58 FGF# 58 sensory organs 58 mesenchymal cells 58 cochlea 58 stromal cells 57 sensory stimuli 57 PrP 57 voxel 57 glial 57 oligodendrocytes 57 electrical impulses 57 mammalian brain 57 nerve fibers 57 cortex 57 forebrain 57 organelle 56 microelectrodes 56 pineal gland 56 sensory input 56 nerve endings 56 RNA molecule 56 auxin 56 excitons 56 diseased tissues 56 neural circuits 56 biological molecules 56 glial cells 56 prion proteins 56 neuronal cells 56 astrocytes 56 sebaceous glands 56 anatomical structures 55 olfactory bulb 55 cerebellar 55 Wnt signaling 55 dye molecules 55 FRET 55 NKT cells 55 luciferase 55 axon 55 eukaryotic cells 55 sodium ions 55 Neurons 55 auditory cortex 55 keratinocytes 55 cochlear 55 cilia 55 Langerhans cells 55 photons 55 Schwann cells 55 odorants 55 chloroplasts 55 dendrite 55 electrodes implanted 55 melanoma tumors 55 fluorescent dye 54 diseased tissue 54 cytosol 54 integrins 54 serotonin receptors 54 dopamine neurons 54 amplitudes 54 transduction 54 mirror neurons 54 subcellular 54 cortical 54 biomolecule 54 cellular metabolism 54 Wnt pathway 54 TRPA1 54 receptor proteins 54 T lymphocytes 54 motor neuron 54 fluorescent dyes 54 glia 54 hippocampal 54 ribozyme