movements of the eye

Question 1

what nerve innervates lateral rectus muscles

Answer 1

CN VI or abducens

Question 2

what nerve innervates superior oblique muscles

Answer 2

CN IV or trochlear

Question 3

what nerve innervates all other muscles of eye (besides lat rectus and sup oblique)

Answer 3

CN III or oculomotor

Question 4

actions of levator palpebrae

Answer 4

elevate eyelid

Question 5

actions of superior rectus

Answer 5

move eye up and in (adduct)

Question 6

actions of inferior rectus

Answer 6

move eye down and in (adduct)

Question 7

actions of medial rectus

Answer 7

move eye medailly (adduct)

Question 8

actions of lateral rectus

Answer 8

move eye laterally (abduct)

Question 9

actions of superior oblique

Answer 9

move eye down and out (abduct)

Question 10

actions of inferior oblique

Answer 10

move eye up and out (abduct)

Question 11

symptoms of oculomotor lesion

4 of them

Answer 11

• dipolia
• lateral strabismus: cant move med
• ptosis
• cant accomodate or constrict pupils

Question 12

symptoms of trochlear lesion

2 of them

Answer 12

• dipolia

- need to tilt head downward to do things like read and walk downstairs

Question 13

symptoms of abducens lesion

2 of them

Answer 13

• dipolia

- medial strabismus: cant move eye laterally