List of Muscles
See also: Table of muscles of the human body#ExtraocularBelow is a table of each of the extraocular muscles and their innervation, origins and insertions, and actions. Note that the muscles may have minor actions in neutral, adduction, or abduction, but the primary action is shown in bold.
| Muscle | Innervation | Origin | Insertion | Neutral position | Adduction | Abduction |
|---|---|---|---|---|---|---|
| Superior rectus | Oculomotor nerve (superior branch) |
Annulus of Zinn | Eye (anterior, superior surface) |
Elevation Incyclotorsion Adduction |
Intorsion Adduction Elevation |
Elevation |
| Inferior rectus | Oculomotor nerve (inferior branch) |
Annulus of Zinn | eye (anterior, inferior surface) |
Depression Extorsion Adduction |
Extorsion Adduction Depression |
Depression |
| Lateral rectus | Abducens nerve | Annulus of Zinn | Eye (anterior, lateral surface) |
Abduction | ||
| Medial rectus | Oculomotor nerve (inferior branch) |
Annulus of Zinn | Eye (anterior, medial surface) |
Adduction | ||
| Superior oblique | Trochlear nerve | Annulus of Zinn via the Trochlea |
Eye (posterior, superior, lateral surface) |
Intorsion Depression Abduction |
Depression Abduction Intorsion |
Intorsion Abduction Depression |
| Inferior oblique | Oculomotor nerve (inferior branch) |
Maxillary bone | Eye (posterior, inferior, lateral surface) |
Extorsion Elevation Abduction |
Elevation Abduction Extorsion |
Extorsion Abduction Elevation |
| Levator palpebrae superioris | Oculomotor nerve | Sphenoid bone | tarsal plate of upper eyelid | Retracts and elevates eyelid |
Read more about this topic: Muscles Of Orbit
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