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2. Superior tarsal muscle - Wikipedia

   en.wikipedia.org/wiki/Superior_tarsal_muscle

   The superior tarsal muscle receives its innervation from the sympathetic nervous system.Postganglionic sympathetic fibers originate in the superior cervical ganglion, and travel via the internal carotid plexus, where small branches communicate with the oculomotor nerve as it passes through the cavernous sinus. [1]

3. Levator palpebrae superioris muscle - Wikipedia

   en.wikipedia.org/wiki/Levator_palpebrae_superior...

   The levator palpebrae superioris receives motor innervation from the superior division of the oculomotor nerve. [1] [2] [3] The smooth muscle that originates from its undersurface, called the superior tarsal muscle is innervated by postganglionic sympathetic axons from the superior cervical ganglion.

4. Tarsus (eyelids) - Wikipedia

   en.wikipedia.org/wiki/Tarsus_(eyelids)

   The superior tarsus (tarsus superior; superior tarsal plate), the larger, is of a semilunar form, about 10 mm (0.4 in) in breadth at the center, and gradually narrowing toward its extremities. It is adjoined by the superior tarsal muscle. To the anterior surface of this plate the aponeurosis of the levator palpebrae superioris is attached.

5. Ptosis (eyelid) - Wikipedia

   en.wikipedia.org/wiki/Ptosis_(eyelid)

   Ptosis may be caused by damage to the muscle that raises the eyelid, damage to the superior cervical sympathetic ganglion or damage to the oculomotor nerve, which controls the muscle. Such damage could be a sign of an underlying disease such as diabetes mellitus, a brain tumor, a pancoast tumor (apex of the lung) and diseases that cause ...

6. Horner's syndrome - Wikipedia

   en.wikipedia.org/wiki/Horner's_syndrome

   Horner's syndrome, also known as oculosympathetic paresis, [1] is a combination of symptoms that arises when a group of nerves known as the sympathetic trunk is damaged. The signs and symptoms occur on the same side (ipsilateral) as it is a lesion of the sympathetic trunk.

7. Roots of the ciliary ganglion - Wikipedia

   en.wikipedia.org/wiki/Roots_of_the_ciliary_ganglion

   Sympathetic fibers from the superior cervical ganglion innervate blood vessels (vasoconstriction), sweat glands, and 4 eye muscles: the dilator pupillae, the superior tarsal muscle, the inferior tarsal muscle and the orbitalis. The dilator pupillae dilates the pupil; its action is antagonistic to the sphincter pupillae. Pupil size is therefore ...