1. It receives upper motor neuron innervation directly via the corticobulbar tract. 2. The nucleus pulposus of the intervertebral disk has no pain innervation . 3. Thus sympathetic innervation to the coronary arteries ultimately causes vasodilation. 4. The innervation of the esophagus develops from the pharyngeal arches. 5. Parasympathetic innervation serves to increase the flow of saliva from these glands. 6. The primary factors that influence HR are autonomic innervation plus endocrine control. 7. ;Sherrington's Second Law : The law of reciprocal innervation . 8. There is a possible correlation between tooth agenesis and innervation . 9. The smooth muscle constricts under parasympathetic innervation and relax under sympathetic innervation. 10. The smooth muscle constricts under parasympathetic innervation and relax under sympathetic innervation .
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