Muscles of Orbit - List of Muscles

List of Muscles

See also: Table of muscles of the human body#Extraocular

Below 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

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