EOM
Medial Rectus - ANS-widest
heaviest
oppose passive form of LR
Closest Insert
Adducts
Superior Oblique - ANS-longest tendon
through the trochlea
-posterior orbital apex originates
- 3 nerve insertions (everything else single insertion)
Primary: intorsion, incycloduction
Secondary: depression
Tertiary: abduction
Annulus of Zinn - ANS-Rectus muscles originate
Tendon of Lockwood - ANS-Anchored to greater wing of sphenoid
Origin SR and superior portion of MR and LR
Tendon of Zinn - ANS-Anchored to inferior root of lesser wing of sphenoid
origin IR and inferior portion of MR and LR
Superior Rectus - ANS-Furtherest Insert
Primary: Elevate
Secondary: Incycloduction
Tertiary: Adduction
Angle - ANS-Eye at 22.5 degrees from medial
Trochlea - ANS-Only collagenous structure in orbit
Saddle for SO
Medial Rectus - ANS-widest
heaviest
oppose passive form of LR
Closest Insert
Adducts
Superior Oblique - ANS-longest tendon
through the trochlea
-posterior orbital apex originates
- 3 nerve insertions (everything else single insertion)
Primary: intorsion, incycloduction
Secondary: depression
Tertiary: abduction
Annulus of Zinn - ANS-Rectus muscles originate
Tendon of Lockwood - ANS-Anchored to greater wing of sphenoid
Origin SR and superior portion of MR and LR
Tendon of Zinn - ANS-Anchored to inferior root of lesser wing of sphenoid
origin IR and inferior portion of MR and LR
Superior Rectus - ANS-Furtherest Insert
Primary: Elevate
Secondary: Incycloduction
Tertiary: Adduction
Angle - ANS-Eye at 22.5 degrees from medial
Trochlea - ANS-Only collagenous structure in orbit
Saddle for SO