Knight Brandon, Fakoya Adegbenro O., Lopez Michael J., Patel Bhupendra C.
LMU-DCOM
Lousiana State University, HSC, Shreveport
The levator palpebrae superioris is a triangular muscle that elevates and retracts the upper eyelid (see Orbital Muscles). This muscle has an abundant blood supply mainly provided by the ophthalmic and supraorbital arteries, both emanating from the internal carotid artery. These vessels anastomose with external carotid branches via the angular and superficial temporal arteries through the superior peripheral arcade. Lymphatic drainage travels laterally to the preauricular/parotid nodes before draining to the deep cervical lymph nodes. The muscle receives innervation from the superior oculomotor nerve branch (3rd cranial nerve or CN III). Levator palpebrae superioris function or innervation problems typically result in upper eyelid ptosis.
提上睑肌是一块三角形肌肉，可提起并回缩上眼睑（见眼眶肌肉）。该肌肉血供丰富，主要由眼动脉和眶上动脉供应，这两条动脉均发自颈内动脉。这些血管通过上方周边弓，经面动脉和颞浅动脉与颈外动脉分支吻合。淋巴引流先横向至耳前/腮腺淋巴结，再引流至颈深淋巴结。该肌肉由动眼神经上支（第3颅神经或CN III）支配。提上睑肌功能或神经支配问题通常会导致上睑下垂。
