extraocular muscle table

Medial Rectus Origin

Annulus of Zinn

Medial Rectus length

40 mm

Medial Rectus nerve supply

Inferior division of CN III

Medial rectus tendon length and width

Length- 3.7 mm

Width- 10.3 mm

Medial rectus muscle action

ADDuction

Medial rectus arc of contact

6.0 mm

Inferior rectus origin

Annulus of Zinn

Inferior rectus length

40 mm

Inferior rectus nerve supply

Inferior division of CN III

Inferior rectus tendon length and width

Length- 5.5 mm

Width- 9.8 mm

Inferior rectus muscle action

Depression

Excycloduction

ADDuction

Inferior rectus arc of contact

12.0 mm

Lateral rectus origin

Annulus of Zinn

Lateral rectus length

40 mm

Lateral rectus nerve supply

CN VI (Abducens)

Lateral rectus tendon length and width

Length- 8.8 mm

Width- 9.2 mm

Lateral rectus muscle action

ABDuction

Lateral rectus arc of contact

6.5 mm

Superior rectus origin

Annulus of Zinn

Superior rectus length

40 mm → longest muscle

Superior rectus nerve supply

Superior division on CN III

Superior rectus tendon length and width

Length- 5.8 mm

Width- 10.8 mm

Superior rectus muscle action

Elevation

Incycloduction

ADDuction

Superior rectus arc of contact

6.5 mm

Inferior oblique origin

Maxillary bone at anterior nasal floor

Inferior oblique length

36 mm

Inferior oblique nerve supply

Inferior division of CN III

Inferior oblique tendon length and width

Length- <1mm

Width- 9.4 mm

Inferior oblique muscle action

Elevation

Excycloduction

ABDuction

Inferior oblique arc of contact

15.00 mm

Super oblique origin

Orbital apex

Superior oblique length

40 mm

Super Oblique nerve supply

CN IV

Superior oblique tendon length and width

Length- 19.5 mm

Width- 10.7 mm

Superior oblique muscle action

Depression

Incycloduction

ABDuction

Superior oblique arc of contact

8.0 mm