Eyes Flashcards
(22 cards)
Lateral rectus function and innervation
abduction (away from nose) Abducens CN VI
Medial rectus function and innervation
adduction (toward nose) Oculomotor CN III
Superior rectus function and innervation
elevation and adduction oculomotor CN III
Inferior rectus function and innervation
depression and adduction oculomotor CN III
Superior oblique function and innervation
depression and abduction trochlear IV
Inferior oblique function and innervation
elevation and abduction oculomotor CN III
What muscles are involved in abduction of the eye?
Superior oblique, inferior oblique, and lateral rectus
What muscles are involved in adduction of the eye?
medial rectus, superior rectus, inferior rectus
What muscles are involved in depression of the eye?
inferior rectus and superior oblique
What muscles are involved in elevation of the eye?
superior rectus and inferior oblique
How do you test lateral rectus?
look lateral
How do you test medial rectus?
look medial
How do you test superior rectus?
look lateral and up
How do you test inferior rectus?
look lateral and down
How do you test inferior oblique?
look medial and up
How do you test superior oblique?
look medial and down
What happens to the eye with a CN III injury?
affected eye drifts down and out
What happens to the eye with a CN IV injury?
affected eye drifts upward
What happens to the eye with CN VI injury?
affected eye to drift medially
CN III injury (onculomotor)
Cranial nerve VI injury (abducens)
CN IV injury (trochlear)
