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Dissection of right orbit from a superior approach

Superior rectus muscle and related fascia

Image #54-4

KEYWORDS: Connective tissue, Eye, Face, Muscles and tendons.

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Dissection of right orbit from a superior approach

Superior rectus muscle and related fascia

The levator palpebrae superioris muscle has been cut and reflected anteriorly. The fascia (18) of the inferior surface of this muscle blends with that of the superior rectus muscle in the region of the eye. In addition, the fascia of the superior rectus muscle spreads medially (5) and laterally (20) to fuse with the fascia from neighboring rectus muscles. The tendon of the superior oblique muscle has been lifted from its trochlea (3). Note that the reflected part of this tendon, which passes under the superior rectus muscle, is encased in dense fascia continuous with that already described.

1 .	Corrugator supercilii muscle and frontal artery
2 .	Supratrochlear nerve (cut off)
3 .	Superior oblique muscle
4 .	Tendon of superior oblique muscle
5 .	Medial expansion of fascia of superior rectus muscle
6 .	Bulbar fascia
7 .	Cribriform plate ethmoid bone
8 .	Medial rectus muscle
9 .	Superior oblique muscle and trochlear nerve (IV)
10 .	Nasociliary nerve
11 .	Artery ethmoidalis posterior
12 .	Ophthalmic artery
13 .	Common annular tendon
14 .	Optic nerve (II) and anterior clinoid process
15 .	Optic chiasm
16 .	Internal carotid artery and optic tract
17 .	Levator palpebrae superioris muscle (reflected)
18 .	Fascia beneath levator muscle (17)
19 .	Lacrimal gland (inferior)
20 .	Lateral expansion of fascia of superior rectus muscle
21 .	Lateral check ligament
22 .	Superior rectus muscle
23 .	Lateral rectus muscle