This PPT contains details about the Extraocular Muscles, their Origin, insertion and Action.

1. EXTRA-OCULAR MUSCLES
Ms. Khushi Kansal
Assistant Professor
SWAMI VIVEKANAND SUBHARTI UNIVERSITY

2. A set of six
extraocular
muscles control
the movement
of the eye

4. Rectus muscles
• Originate from a common tendinous ring
(the annulus of zinn), which is attached at
the apex of the orbit.

6. Superior Oblique Muscle
• Arises from the bone above and medial to
the common tendinous ring (optic foramina).
• Inserted in the upper and outer part of the
sclera behind the equater.

7. Inferior Oblique Muscle

10. ACTIONS
• The EOM rotate the eyeball around vertical,
horizontal and anteroposterior axes.

11. MUSCLE PRIMARY ACTION SECONDARY ACTION TERTIARY ACTION
LR Abduction - -
SR Elevation Intorsion Adduction
IR Depression Extorsion Adduction
SO Intorsion Depression Abduction
IO Extorsion Elevation abduction