Muscles of the eye

Question 1

Name the extrinsic muscles of the eye

Answer 1

Medial rectus, Lateral Rectus, , Superior rectus, Inferior rectus, Inferior oblique, Superior Oblique, LPS

Question 2

Name the intrinsic eye muscles

Answer 2

Ciliaris muscle, Constrictor pupillae, Dilator pupillae

Question 3

Which muscles are innervated by the 3rd cranial nerve (occulomotor)

Answer 3

All of them including intrinsic except the Lateral rectus and the superior oblique

Question 4

Which muscle is innervated by the 4th cranial nerve?

Answer 4

The trochlear innervates the Superior oblique

Question 5

Which muscle is innervated by the 6th cranial nerve?

Answer 5

The lateral rectus

Question 6

What intrinsic muscles are innervated by parasympathetic fibres?

Answer 6

The ciliaris muscle and the sphcinter pupillae, both involved in constriction on the pupil, when focusing on close up objects

Question 7

What intrinsic muscle is innervated by the sympathetic fibres?

Answer 7

The dilator pupillae involved in dilation of the pupil, when focusing on far away objects

Question 8

What movements are the SO and IO responsible for?

Answer 8

SO is responsible for Depression and Intorison

IO in responsible for elevation and extorsion

Question 9

What is the name for a divergent squint and when would you see it?

Answer 9

Extropia - Seen in myopia

Question 10

What is the name for a convergent squint and when would you see it?

Answer 10

Estropia - Seen in hyperopia

Question 11

What is Anisocoria and where is it seen?

Answer 11

Pupils of different sizes and is seen in Horners syndrome?