Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: Sep 12th, 2025

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The eyelid's motor nerves descend from the facial nerves, which are the seventh pair of cranial nerves. They arise from the lower part of the pons at the base of the brain stem and emerge on the sides of the face. Its motor fibers send impulses to muscles for facial expressions. Other fibers function involuntarily by stimulating the tear gland.

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Innerbody Research does not provide medical advice, diagnosis, or treatment. You must consult your own medical professional.