Eye Muscles

Question 1

How Many Muscles Control Eye Movement? (Extraocular Muscles)

Answer 1

Six

Question 2

Medial Rectus

Answer 2

The most powerful of the extraocular muscles. It’s only action is to turn the eye toward the nose (adduction).

Question 3

Inferior Rectus

Answer 3

Its primary action is to turn the eye downward.

It also adducts the eye. Additionally, it can rotate the top of the eye toward the temple and the bottom of the eye toward the nose (extorsion)

Question 4

Lateral Rectus

Answer 4

Its only action is to move the eye away from the nose (abduction)

Question 5

Superior Rectus

Answer 5

Its primary action is to move the eye upward (elevation). It also adducts the eye. Additionally, it can rotate the top of the eye toward the nose and the bottom of the eye toward the temple (intorsion)

Question 6

Superior Oblique

Answer 6

Its primary action is to turn the top of the eye towards the nose (intorsion). It is also responsible for moving eye downward (depression) and abduction (outward-away from nose).

Downward and diagonally

Question 7

Inferior Oblique

Answer 7

The only extraocular muscle that has its origin at the front of the orbit. Its primary action is to turn eye down and away from nose (extorsion).It is also responsible for turning the eye upward (elevation) and abduction (outward-away from nose)

Upward and diagonally.