Dissection of left orbit from an anterior approach

Muscle fibers near medial angle of eyelids

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Image #52-7

Dissection of left orbit from an anterior approach

Muscle fibers near medial angle of eyelids

Note that no fibers attach to the anterior surface of the medial palpebral ligament.

1. Infratrochlear nerve
2. Muscle fibers which joined frontalis muscle
3. Periosteum covering nasal bone
4. Area of origin of superior part of orbicularis oculi muscle
5. Area of origin of inferior part of orbicularis oculi muscle
6. Lacrimal part orbicularis oculi muscle
7. Medial palpebral ligament
8. Angular head of levator labii superioris muscle (cut across)
9. Frontal nerve
10. Corrugator supercilii muscle
11. Supratrochlear nerve
12. Orbital septum (note its downward extension deep to the orbicularis muscle toward an attachment on the posterior lacrimal crest)
13. Aponeurosis of levator palpebrae superioris muscle (upper pointer, cutaneous insertion; lower pointer, tarsal insertion)
14. Superior tarsus
15. Middle palpebral artery
16. Superior palpebral nerves
17. Lacrimal duct
18. Lacrimal lake
19. Medial ocular angle