Related by context. Frequent words. (Click for all words.) 76 nerve impulses 73 electrical pulses 70 electrical currents 62 vagus nerve 60 electrodes 59 nerve fibers 58 electrical stimulation 57 nerve cells 57 cochlea 55 neurons 54 photons 53 neuron 52 nerve endings 52 brainwaves 52 Neurons 52 ventricles 52 ventricular fibrillation 51 thalamus 51 neural 51 pulses 51 peripheral nerves 50 brainstem 50 atria 49 cortex 49 magnetic fields 49 neurones 49 electrons 48 neurotransmitters 48 neurotransmitter 48 sweat glands 48 hypothalamus 48 electromagnetic waves 48 brain circuitry 48 visual cortex 48 brain 47 respiration 47 electrode 47 blood vessels 47 circuitry 47 synapses 47 electrically 47 synapse 47 volts 47 dopamine 47 surgically implanted 47 vibrations 46 motor cortex 46 optic nerve 46 heartbeats 46 vibrational 46 axons 46 messenger RNA 46 muscle fibers 46 motor neurons 46 muscle tissue 46 mitochondria 46 circulatory system 45 photon 45 electromagnetic 45 arrhythmias 45 implantable devices 45 auditory 45 neural networks 45 signals 45 axon 45 dendrites 45 cell membranes 45 impulses 44 infrared radiation 44 RNA molecules 44 cardiomyocytes 44 optical fibers 44 capillaries 44 cell membrane 44 cerebellum 44 kinetic energy 44 irregular heartbeats 44 dermis 44 signaling molecules 43 laser beams 43 adrenal glands 43 striatum 43 ion channels 43 stimulator 43 gastrointestinal tract 43 neuronal 43 cilia 43 cortical 43 molecules 43 diseased tissue 43 facial muscles 42 fibroblasts 42 glutamate 42 pulsing 42 cerebral cortex 42 GI tract 42 waveforms 42 pulsed 42 heartbeat 42 adrenal gland 42 hair follicles