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CRANIAL NERVE FUNCTION & MUSCLE
INNERVATION
RELATIVE TO EYE MOVEMENT
Superior rectus
CN III
Inferior oblique
CN III
Lateral rectus
CN VI
Medial rectus
CN III
Superior oblique
CN IV
Inferior rectus
CN III
Name Origin Insertion Angl
e
*
Primary
Action
Secondary
Action
For
Exami
nation
Superior
Rectus
Common
Tendi
nous
Ring
Sclera (Posterior to
the Corneal
Margin )
23 Elevation
@
Intorsion ?
Adduction
Asked to
see up
& out
Inferior
Rectus
Common
Tendi
nous
Ring
Sclera (Posterior to
the Corneal
Margin )
23 Depressio
n
Extorsion-
Adduction
Asked to
see
Down
& out
Superior
Oblique
Apex of
Orbit
Superior
Posterolateral
Quadrant
51 Intorsion Depression-
Abduction
Asked to
see
Down
& in
Inferior
Oblique
Floor of
Orbit
Inferior
Posterolateral
Quadrant
51 Extorsion
#
Elevation-
Abduction
Asked to
see up
& in
Medial Rectus Common
Tendi
nous
Ring
Sclera (Posterior to
the Corneal
Margin )
23 Adduction ----- Asked to
see
Media
l
Lateral
Rectus
Common
Tendi
Sclera (Posterior to
the Corneal
23 Abduction ----- Asked to
see
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye
Eye

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  • 21. CRANIAL NERVE FUNCTION & MUSCLE INNERVATION RELATIVE TO EYE MOVEMENT Superior rectus CN III Inferior oblique CN III Lateral rectus CN VI Medial rectus CN III Superior oblique CN IV Inferior rectus CN III
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  • 31. Name Origin Insertion Angl e * Primary Action Secondary Action For Exami nation Superior Rectus Common Tendi nous Ring Sclera (Posterior to the Corneal Margin ) 23 Elevation @ Intorsion ? Adduction Asked to see up & out Inferior Rectus Common Tendi nous Ring Sclera (Posterior to the Corneal Margin ) 23 Depressio n Extorsion- Adduction Asked to see Down & out Superior Oblique Apex of Orbit Superior Posterolateral Quadrant 51 Intorsion Depression- Abduction Asked to see Down & in Inferior Oblique Floor of Orbit Inferior Posterolateral Quadrant 51 Extorsion # Elevation- Abduction Asked to see up & in Medial Rectus Common Tendi nous Ring Sclera (Posterior to the Corneal Margin ) 23 Adduction ----- Asked to see Media l Lateral Rectus Common Tendi Sclera (Posterior to the Corneal 23 Abduction ----- Asked to see