Extraocular muscles

Question 1

The muscles connect to the globe ( along w their stiff tendons) at sites called the _

Answer 1

Insertion

Question 2

The distance of insertion of rectus muscles from the corneal limbus are as follows: medial retus _ mm inferior _ mm lateral retus _ mm superior retus _mm

Answer 2

5.5, 6.5, 7, 7.7

Question 3

The _ muscle originates from the nasal orbital wall behind the rim, passes under the inferior rectus, curves around the eye, and inserts under the lateral rectus posterior on the eye

Answer 3

Inferior oblique ( IO)

Question 4

The _ muscle originates from the annulus of Zinn, passes through the trochlea ( pulley) on the nasal orbital rim, then under the superior rectus tendon to insert into the the sclera

Answer 4

Superior oblique( SO)

Question 5

If the eye looks towards the nose ( nasally) it is called

Answer 5

Adduction

Question 6

If the eye looks towards the ear ( temporally) it is called

Answer 6

Abduction

Question 7

If the eye looks up it is called

Answer 7

Elevation

Question 8

If the eye looks up it is called

Answer 8

Depression

Question 9

__ refers to nasal rotation from the 12 o clock position

Answer 9

Incycloduction ( intorsion)

Question 10

__ refers to temporal rotation from the 12 o clock position

Answer 10

Excycloduction ( extorison)

Question 11

Contraction of the MR primary ( and only) action

Answer 11

Adduction

Question 12

Contraction of the LR primary ( and only) action

Answer 12

Abduction

Question 13

Contraction of the SR Primary action, secondary action, tertiary action

Answer 13

Elevation , adduction, incycloduction ( intorsion)

Question 14

Contraction of the IR primary action, secondary action, tertiary action

Answer 14

Depression, adduction, excycloduction

Question 15

Contraction of the SO primary action, secondary action, tertiary action

Answer 15

Incycloduction, depression, abduction

Question 16

Contraction of the IO primary action, secondary action, tertiary action

Answer 16

Excycloduction, elevation , abduction

Question 17

__ is when both eye turn towards the nose to look near

Answer 17

Convergence

Question 18

_ is when both eyes turn away from the nose to look distance

Answer 18

Divergence

Question 19

_ is when both eyes move in the same direction

Answer 19

Version

Question 20

The extraocular muscles nerve innervation is

Answer 20

LR6, SO4, R3

Question 21

All of the extraocular muscles except for the inferior oblique originate in the

Answer 21

Annulus of Zinn