Related by context. Frequent words. (Click for all words.) 65 nerve impulses 62 skeletal muscles 60 electrical impulses 59 muscles 58 electrical pulses 56 jaw muscles 56 autonomic nervous system 56 vagus nerve 55 facial muscles 55 repetitive motions 55 nerve endings 54 Aerobic exercise 54 electrical currents 54 vasodilation 53 muscle tissue 53 twitches 53 sweat glands 53 muscle fibers 53 electrical stimulation 52 profuse sweating 52 sensory input 52 neuronal activity 52 proprioception 52 excitatory 52 biochemical reactions 52 neuromuscular 52 synaptic connections 51 contractile 51 pulsations 51 secretions 51 biochemical processes 51 involuntary movements 51 secretion 51 nerve cells 51 respiration 51 physiologically 50 external stimuli 50 sensory neurons 50 neural pathways 50 contractility 50 oxygen uptake 50 clot formation 50 ventricular arrhythmias 50 aerobic activity 50 stress hormones 50 exertion 50 skeletal muscle 50 musculature 50 metabolism 50 arousal 50 capillaries 49 pulsation 49 homeostatic 49 flagella 49 ventricular fibrillation 49 postural 49 peripheral nerves 49 lower extremities 49 nerve stimulation 49 noradrenaline 49 physiological 49 sebaceous glands 48 physiological responses 48 neurochemical 48 stimulation 48 exhalation 48 sensory stimulation 48 innate immune response 48 nerve fibers 48 metabolic processes 48 chemical messengers 48 thick mucus 48 pronation 48 physiologic 48 irregular heartbeats 48 muscle spasms 48 nerve regeneration 48 perineum 48 NMDA receptors 48 frequent urination 48 tingling sensation 48 prostaglandins 48 muscular endurance 47 ulcerations 47 magnetic fields 47 electrodes 47 chemical reactions 47 neurotransmitter dopamine 47 rhythmical 47 ventricular tachycardia 47 arrhythmias 47 gait 47 neurones 47 synapses 47 serotonin receptors 47 inflammatory cytokines 47 swellings 47 diaphragm 47 neural circuits 47 burning sensation 47 twitching