EXTRA OCULAR MUSCLE ANATOMY

1. EXTRA OCULAR MUSCLES
ANATOMY
Presented By : MANISH CHAUDHARY
B.Sc. Optometry, 3rd year

2. INTRODUCTION
 Extra ocular muscles are the muscles that
control the movement of eye.
 There are six extra ocular muscles i.e four
rectii muscles and two oblique muscles.

3. NERVE SUPPLY OF EXTRA OCULAR MUSCLES
 Among 12 pairs of cranial nerves ,3 pairs of
cranial nerves supply extra ocular muscles.
#Third cranial nerve
#Fourth cranial nerve
#Sixth cranial nerve

4.  Oculomotor nerve : Superior rectus , inferior
rectus , medial rectus and inferior oblique
 Trochlear nerve : Superior oblique muscle
 Abducent nerve : Lateral rectus muscle

5. BLOOD SUPPLY OF EXTRA OCULAR MUSCLES
MUSCLES ARTERIES
Superior rectus muscle Lateral branch of opthalmic artery
Medial rectus muscle Medial branch of opthalmic artery ,
lacrimal artery
Inferior rectus muscle Medial branch of opthalmic artery , infra
orbital artey
Lateral rectus muscle Lateral branch of opthalmic artery
Superior oblique muscle Lateral branch of opthalmic artery
Inferior oblique muscle Medial branch of opthalmic artery , infra
orbital artey
LPS Lateral branch of opthalmic artery

6. ACTIONS OF EXTRA OCULAR MUSCLES
 Extra ocular muscles have three main
actions ie. Primary action , secondary action
and tertiary action .

8. Muscles Primary Action Secondary Action Tertiary Action
Medial Rectus Adduction
Lateral Rectus Abduction
Superior Rectus Elevation Intorsion Adduction
Inferior Rectus Depression Extorsion Adduction
Superior Oblique Intorsion Depression Abduction
Inferior Oblique Extorsion Elevation Abduction

9. THANK YOU