Dissection of right orbit from a superior approach

Relation of aponeurosis of levator palpebrae superioris muscle to tendon of superior oblique muscle and lacrimal gland

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Image #54-2

Dissection of right orbit from a superior approach Relation of aponeurosis of levator palpebrae superioris muscle to tendon of superior oblique muscle and lacrimal gland The bone of the orbital margin has been resected and the fascia covering the levator palpebrae muscle removed. Subcutaneous structures of the supraorbital region (13-16) have been preserved along with the thickened rim of periorbita at the margin of the orbit (17). The superior orbital fissure (24) has been opened to display nerves which traverse it. The superior ophthalmic vein has been removed. 1 . Frontal sinus 2 . Superior oblique muscle 3 . Reflected part of tendon of superior oblique muscle (the thick fascia which surrounds the tendon blends with fascia of the levator and superior rectus muscles as well as with the bulbar fascia) 4 . Supratrochlear nerve 5 . Ophthalmic artery 6 . Fascia covering medial rectus muscle 7 . Anterior ethmoidal artery and nerve (entering anterior ethmoidal foramen) 8 . Superior oblique muscle 9 . Levator palpebrae superioris muscle 10 . Posterior ethmoidal artery (posterior ethmoidal nerve absent) 11 . Upper pointer: Common annular tendon Lower pointer: Trochlear nerve (IV) 12 . Optic nerve (II) 13 . Corrugator supercilii muscle 14 . Supraorbital artery (supraorbital branch of ophthalmic artery absent in this specimen) 15 . Supraorbital nerve 16 . Communicating branch between supraorbital nerve and facial nerve 17 . Periorbita at supraorbital margin 18 . Aponeurosis of levator palpebrae superioris muscle 19 . Superior lacrimal gland 20 . Superior rectus muscle 21 . Eyeball 22 . Lateral rectus muscle 23 . Lacrimal nerve 24 . Superior orbital fissure (opened)