"origin: undersurface of the levator palpebrae superioris muscle"
"insertion: upper margin of the superior tarsal plate"
"innervation: sympathetic fibres in the superior branch of the oculomotor nerve (CN III) originating from the superior cervical ganglion via internal carotid artery sympathetic plexus"
Expected headings
"Summary"
"Clinical significance"
"In Horner syndrome, disruption (e.g. stroke, malignancy, trauma) along the oculosympathetic pathway can reduce the sympathetic innervation of the superior tarsal muscle leading to partial ptosis. There are usually other signs of Horner syndrome present to help differentiate from other causes of ptosis."