Orbital Muscles Flashcards Preview

Spinal Anatomy I - Exam 3 > Orbital Muscles > Flashcards

Flashcards in Orbital Muscles Deck (11):
1

What are the extrinsic muscles of the eyeball?

- superior rectus
- inferior rectus
- medial rectus
- lateral rectus
- superior oblique
- inferior oblique

2

What are the common characteristics in origin and insertion of all rectus extraocular muscles?

- they all originate from a common annular tendon in the orbit
- they all insert into the sclera in front of the coronal equator of the eyeball

3

What are the common characteristic regarding the insertion of both oblique extraocular muscles?

both insert onto sclera on the lateral margin of the eyebal behind the coronal equator

4

What is the common characteristic concerning the insertion of the superior and inferior rectus extraocular muscles?

they insert onto the sclera of the eyeball in front of the coronal equator and are displaced medially

5

What is the apparent function of the medial rectus?

- pulls the cornea inward/medially
- adducts the cornea

6

What is the apparent function of the lateral rectus?

- pulls the cornea outward/laterally
- abducts the cornea

7

What is the apparent function of the superior rectus?

- pulls the cornea upward/superiorly and at the same time rotates the cornea inward
- elevation and adduction of the cornea
- conjunct movement of intorsion

8

What is the apparent function of the inferior rectus?

- pulls the cornea downward/inferiorly and at the same time rotates the cornea inward
- depression and adduction of the cornea
- conjunct movement of extorsion

9

What is the apparent function of the superior oblique?

- pulls the back of the eyeball upward and inward which causes the cornea to rotate downward and outward
- depression and abduction of the cornea
- conjunct movement of intorsion

10

What is the apparent function of the inferior oblique?

- pulls the back of the eyeball downward and inward which causes the cornea to rotate upward and outward
- elevation and abduction of the cornea
- conjunct movement of extorsion

11

Disruption of coordinated eye movements usually results in what?

diplopia: double vision

Decks in Spinal Anatomy I - Exam 3 Class (94):