L14 - Extraocular Muscles

Question 1

What are the 2 functions of extra ocular muscles

Answer 1

• Eye movement
• Lid closure

Question 2

What is the spiral of tillaux

Answer 2

An imaginary line connecting the insertions of the eyes recti muscles

Question 3

What are the 6 types of extra ocular muscles

Answer 3

• Superior recuts
• Superior oblique
• Lateral recuts
• Inferior oblique
• Inferior recuts
• Medial rectus

Question 4

What are the 6 types of eye movement

Answer 4

• Lateral rotation (Abduction)
• Medial rotation (Adduction)
• Elevation
• Depression
• Intortion (medial rotation of the eye)
• Extortion (lateral rotation of the eye)

Question 5

What is the superior rectus muscle

Answer 5

Is located at the common tendinous ring at the apex of the orbit and is involved in elevation adduction and intortion

Question 6

What is the inferior rectus muscle

Answer 6

Is located at the common tendinous ring at the apex of the orbit and is involved in depression adduction and extortion

Question 7

What is the lateral rectus muscle

Answer 7

Is located at the common tendinous ring at the apex of the orbit and is involved in abduction

Question 8

What is the medial rectus muscle

Answer 8

Is located at the common tendinous ring at the apex of the orbit and is involved in adduction

Question 9

What is the superior oblique muscle

Answer 9

Located at the lesser wing above the optical canal and is involved in intortion depression and abduction

Question 10

What is the trochlea oculi

Answer 10

A fibrous sling which serves as a hook for the superior oblique muscle

Question 11

What is the inferior oblique muscle

Answer 11

Located at the floor of the orbit lateral to the lacrimal groove and is involved in elevation abduction and extortion

Question 12

What is the musculus levator palpebrae superioris

Answer 12

Muscle which raises and retracts the superior eye lid