HEAD & NECK: Orbital muscles

Question 1

EXTRAOCULAR MUSCLES

Levator palpebrae superioris - origin

Answer 1

Lesser wing of sphenoid bone

Question 2

EXTRAOCULAR MUSCLES

Levator palpebrae superioris - insertion

Answer 2

Superior tarsal plate, Skin of upper eyelid

Question 3

EXTRAOCULAR MUSCLES

Levator palpebrae superioris - innervation

Answer 3

Oculomotor nerve (CN III)

Question 4

EXTRAOCULAR MUSCLES

Levator palpebrae superioris - function

Answer 4

Elevates superior eyelid

Question 5

EXTRAOCULAR MUSCLES

Lateral rectus - origin

Answer 5

Common tendinous ring (Anulus of Zinn)

Question 6

EXTRAOCULAR MUSCLES

Lateral rectus - insertion

Answer 6

Anterior half of eyeball (posterior to corneoscleral junction)

Question 7

EXTRAOCULAR MUSCLES

Lateral rectus - innervation

Answer 7

Abducens nerve (CN VI)

Question 8

EXTRAOCULAR MUSCLES

Lateral rectus - function

Answer 8

Abducts eyeball

Question 9

EXTRAOCULAR MUSCLES

Medial rectus - origin

Answer 9

Common tendinous ring (Anulus of Zinn)

Question 10

EXTRAOCULAR MUSCLES

Medial rectus - insertion

Answer 10

Anterior half of eyeball (posterior to corneoscleral junction)

Question 11

EXTRAOCULAR MUSCLES

Medial rectus - innervation

Answer 11

Oculomotor nerve (CN III)

Question 12

EXTRAOCULAR MUSCLES

Medial rectus - function

Answer 12

Adducts eyeball

Question 13

EXTRAOCULAR MUSCLES

Superior rectus - origin

Answer 13

Common tendinous ring (Anulus of Zinn)

Question 14

EXTRAOCULAR MUSCLES

Superior rectus - insertion

Answer 14

Anterior half of eyeball (posterior to corneoscleral junction)

Question 15

EXTRAOCULAR MUSCLES

Superior rectus - innervation

Answer 15

Oculomotor nerve (CN III)

Question 16

EXTRAOCULAR MUSCLES

Superior rectus - function

Answer 16

Elevates, adducts, internally rotates eyeball

Question 17

EXTRAOCULAR MUSCLES

Inferior rectus - origin

Answer 17

Common tendinous ring (Anulus of Zinn)

Question 18

EXTRAOCULAR MUSCLES

Inferior rectus - insertion

Answer 18

Anterior half of eyeball (posterior to corneoscleral junction)

Question 19

EXTRAOCULAR MUSCLES

Inferior rectus - innervation

Answer 19

Oculomotor nerve (CN III)

Question 20

EXTRAOCULAR MUSCLES

Inferior rectus - function

Answer 20

Depresses, adducts, Externally rotates eyeball

Question 21

EXTRAOCULAR MUSCLES

Inferior oblique - origin

Answer 21

Orbital surface of maxilla

Question 22

EXTRAOCULAR MUSCLES

Inferior oblique - insertion

Answer 22

Inferolateral aspect of eyeball (deep to lateral rectus muscle)

Question 23

EXTRAOCULAR MUSCLES

Inferior oblique - innervation

Answer 23

Oculomotor nerve (CN III)

Question 24

EXTRAOCULAR MUSCLES

Inferior oblique - function

Answer 24

Abducts, elevates, Externally rotates eyeball

Question 25

EXTRAOCULAR MUSCLES Superior oblique - origin

Answer 25

Body of sphenoid bone

Question 26

EXTRAOCULAR MUSCLES Superior oblique - insertion

Answer 26

Superolateral aspect of eyeball (deep to rectus superior, via trochlea orbitae)

Question 27

EXTRAOCULAR MUSCLES Superior oblique - innervation

Answer 27

Trochlear nerve (CN IV)

Question 28

EXTRAOCULAR MUSCLES Superior oblique - function

Answer 28

Abducts, depresses, internally rotates eyeball