Ocular Motility

Question 1

What is ocular motility?

Answer 1

Ocular motility refers to the movement of the eyes and the muscles that control these movements.

Question 2

True or False: Ocular motility only involves horizontal movements.

Answer 2

False

Question 3

Name the six extraocular muscles responsible for eye movement.

Answer 3

Superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique, inferior oblique.

Question 4

What is the primary function of the medial rectus muscle?

Answer 4

To adduct the eye.

Question 5

Fill in the blank: The _____ reflex involves the coordination of eye movements with head movements.

Answer 5

vestibulo-ocular

Question 6

Which cranial nerve controls the superior oblique muscle?

Answer 6

Trochlear nerve (CN IV).

Question 7

True or False: The lateral rectus muscle is innervated by the abducens nerve.

Answer 7

True

Question 8

What type of eye movement is used to track a moving object?

Answer 8

Pursuit movement.

Question 9

What is the term for the rapid movement of the eyes between fixation points?

Answer 9

Saccade.

Question 10

Which nerve is responsible for innervating the majority of the extraocular muscles?

Answer 10

Oculomotor nerve (CN III).

Question 11

What is the role of the inferior oblique muscle?

Answer 11

To elevate and abduct the eye.

Question 12

Fill in the blank: Abnormal ocular motility can lead to _____ vision.

Answer 12

double

Question 13

True or False: Ocular motility assessment is not important in neurological examinations.

Answer 13

False

Question 14

What is the purpose of eye convergence?

Answer 14

To allow for binocular vision when focusing on near objects.

Question 15

Which condition is characterized by the inability to move the eyes in a coordinated manner?

Answer 15

Strabismus.

Question 16

What is the term for involuntary eye movements that can affect vision?

Answer 16

Nystagmus.

Question 17

What type of eye movement is primarily used when reading?

Answer 17

Saccadic movements.

Question 18

Fill in the blank: The _____ system integrates sensory input to coordinate eye movements.

Answer 18

central nervous

Question 19

What is the effect of a lesion in the abducens nerve?

Answer 19

It can cause an inability to abduct the affected eye.

Question 20

Which eye movement allows for the stabilization of the visual field during head movements?

Answer 20

Vestibulo-ocular reflex.

Question 21

True or False: All extraocular muscles are responsible for moving the eye in the same direction.

Answer 21

False

Question 22

What is the primary function of the superior rectus muscle?

Answer 22

To elevate the eye.

Question 23

What is the main function of the inferior rectus muscle?

Answer 23

To depress the eye.

Question 24

Fill in the blank: The _____ test is used to assess ocular motility.

Answer 24

Hirschberg

Question 25

What is the name of the condition where the eyes do not align properly?

Answer 25

Strabismus.

Question 26

Which cranial nerve is affected in a patient with ptosis and eye adduction issues?

Answer 26

Oculomotor nerve (CN III).