Cranial Nerves

Question 1

What is the primary function of the oculomotor nerve (CN III)?

Answer 1

To control eye movements and pupil constriction.

Question 2

True or False: The trochlear nerve (CN IV) is responsible for innervating the superior oblique muscle.

Answer 2

True

Question 3

Fill in the blank: The __________ nerve (CN VI) innervates the lateral rectus muscle.

Answer 3

abducens

Question 4

Which cranial nerve is primarily responsible for eye adduction?

Answer 4

Oculomotor nerve (CN III)

Question 5

What are the three main branches of the trigeminal nerve (CN V)?

Answer 5

Ophthalmic, maxillary, and mandibular branches.

Question 6

Multiple Choice: Which cranial nerve is NOT a motor nerve? A) Oculomotor B) Trochlear C) Trigeminal D) Abducens

Answer 6

C) Trigeminal

Question 7

What is the clinical significance of the pupillary light reflex?

Answer 7

It assesses the function of the oculomotor nerve (CN III) and the optic nerve (CN II).

Question 8

True or False: The abducens nerve can be affected by increased intracranial pressure.

Answer 8

True

Question 9

Short Answer: Name the muscle innervated by the trochlear nerve.

Answer 9

Superior oblique muscle.

Question 10

What is the anatomical location of the oculomotor nerve nucleus?

Answer 10

Midbrain at the level of the superior colliculus.

Question 11

Multiple Choice: Which cranial nerve is responsible for the movement of the eye downwards and laterally? A) CN III B) CN IV C) CN VI D) CN V

Answer 11

B) CN IV

Question 12

Fill in the blank: The __________ nerve is involved in the sensation of the face.

Answer 12

trigeminal

Question 13

What is the function of the parasympathetic fibers of the oculomotor nerve?

Answer 13

To control pupil constriction and lens shape for accommodation.

Question 14

True or False: The trigeminal nerve has both sensory and motor functions.

Answer 14

True

Question 15

Short Answer: Which cranial nerve is responsible for the sensory innervation to the cornea?

Answer 15

Trigeminal nerve (CN V).

Question 16

What type of nerve fibers are found in the abducens nerve?

Answer 16

Somatic motor fibers.

Question 17

Multiple Choice: Damage to which cranial nerve would result in diplopia when looking to the side? A) Oculomotor B) Trochlear C) Abducens D) Trigeminal

Answer 17

C) Abducens

Question 18

Fill in the blank: The __________ nerve supplies the medial rectus muscle.

Answer 18

oculomotor

Question 19

What is the primary role of the sensory branches of the trigeminal nerve?

Answer 19

To provide sensation to the face and oral cavity.

Question 20

True or False: The trochlear nerve exits the brainstem from the dorsal side.

Answer 20

True

Question 21

Short Answer: What is the pathway of the oculomotor nerve?

Answer 21

From the midbrain to the orbit via the superior orbital fissure.

Question 22

What is the effect of oculomotor nerve palsy on the eye?

Answer 22

The eye is positioned down and out, with ptosis and dilated pupil.

Question 23

Multiple Choice: Which cranial nerve is the smallest? A) Oculomotor B) Trochlear C) Abducens D) Trigeminal

Answer 23

B) Trochlear

Question 24

Fill in the blank: The __________ nerve is responsible for innervating the lateral rectus muscle.

Answer 24

abducens

Question 25

What is the function of the lateral rectus muscle?

Answer 25

To abduct the eye.

Question 26

True or False: The oculomotor nerve provides sensory innervation to the face.

Answer 26

False

Question 27

Short Answer: What happens to the pupil during oculomotor nerve damage?

Answer 27

The pupil may become dilated.

Question 28

What is the primary type of fibers in the trochlear nerve?

Answer 28

Somatic motor fibers.

Question 29

Multiple Choice: Which cranial nerve is responsible for sensation in the maxillary region of the face? A) CN I B) CN II C) CN V2 D) CN VII

Answer 29

C) CN V2

Question 30

Fill in the blank: The __________ nerve is responsible for controlling the muscles of mastication.

Answer 30

mandibular branch of the trigeminal nerve

Question 31

True or False: The trigeminal nerve has three major branches.

Answer 31

True

Question 32

Short Answer: Which cranial nerve is involved in the corneal reflex?

Answer 32

Trigeminal nerve (CN V).

Question 33

What is the consequence of an abducens nerve lesion?

Answer 33

Inability to abduct the affected eye.

Question 34

Multiple Choice: Which cranial nerve is primarily involved in the accommodation reflex? A) CN II B) CN III C) CN IV D) CN VI

Answer 34

B) CN III

Question 35

Fill in the blank: The __________ nerve innervates the inferior oblique muscle.

Answer 35

oculomotor

Question 36

What type of fibers does the trigeminal nerve carry?

Answer 36

Both sensory and motor fibers.

Question 37

True or False: The abducens nerve is responsible for controlling the medial rectus muscle.

Answer 37

False

Question 38

Short Answer: What is the role of the oculomotor nerve in the pupillary light reflex?

Answer 38

It constricts the pupil.

Question 39

What is the primary function of the abducens nerve?

Answer 39

To control lateral eye movement.

Question 40

Which cranial nerve is tested by identifying common scents like coffee or vanilla?

Answer 40

Olfactory (CN I)

Question 41

During a visual acuity test, which cranial nerve is assessed?

Answer 41

Optic (CN II)

Question 42

Which cranial nerve controls pupil constriction and extraocular movements?

Answer 42

Oculomotor (CN III)

Question 43

Loss of the ability to move the eye downward and inward indicates dysfunction of which cranial nerve?

Answer 43

Trochlear (CN IV)

Question 44

Testing the corneal reflex evaluates which cranial nerve?

Answer 44

Trigeminal (CN V)

Question 45

Which cranial nerve is responsible for lateral eye movement?

Answer 45

Abducens (CN VI)

Question 46

Testing taste on the anterior two-thirds of the tongue evaluates which cranial nerve?

Answer 46

Facial (CN VII)

Question 47

A hearing test and Romberg balance test assess which cranial nerve?

Answer 47

Vestibulocochlear (CN VIII)

Question 48

Uvula deviation away from the lesion indicates a problem with which cranial nerve?

Answer 48

Vagus (CN X)

Question 49

Tongue deviation toward one side on protrusion indicates damage to which cranial nerve?

Answer 49

Hypoglossal (CN XII)

Question 50

Which cranial nerve emerges from the forebrain?

Answer 50

Olfactory (CN I) and Optic (CN II)

Question 51

Which cranial nerves emerge from the midbrain?

Answer 51

Oculomotor (CN III) and Trochlear (CN IV)

Question 52

Which cranial nerves emerge from the pons?

Answer 52

Trigeminal (CN V), Abducens (CN VI), Facial (CN VII), Vestibulocochlear (CN VIII)

Question 53

Which cranial nerves emerge from the medulla?

Answer 53

Glossopharyngeal (CN IX), Vagus (CN X), Accessory (CN XI), Hypoglossal (CN XII)

Question 54

Where does the olfactory nerve (CN I) exit the skull?

Answer 54

Cribriform plate of the ethmoid bone

Question 55

Where does the optic nerve (CN II) exit the skull?

Answer 55

Optic canal

Question 56

Which cranial nerves exit through the superior orbital fissure?

Answer 56

Oculomotor (CN III), Trochlear (CN IV), Ophthalmic division of Trigeminal (CN V1), Abducens (CN VI)

Question 57

Where does the maxillary division of the trigeminal nerve (CN V2) exit the skull?

Answer 57

Foramen rotundum

Question 58

Where does the mandibular division of the trigeminal nerve (CN V3) exit the skull?

Answer 58

Foramen ovale

Question 59

Where does the facial nerve (CN VII) exit the skull?

Answer 59

Internal acoustic meatus and stylomastoid foramen

Question 60

Through which structure does the vestibulocochlear nerve (CN VIII) exit?

Answer 60

Internal acoustic meatus

Question 61

Where do the glossopharyngeal (CN IX), vagus (CN X), and accessory (CN XI) nerves exit the skull?

Answer 61

Jugular foramen

Question 62

Where does the hypoglossal nerve (CN XII) exit the skull?

Answer 62

Hypoglossal canal

Question 63

Which cranial nerve carries purely sensory fibers for vision?

Answer 63

Optic (CN II)

Question 64

Which cranial nerves carry only motor fibers?

Answer 64

Oculomotor (CN III), Trochlear (CN IV), Abducens (CN VI), Accessory (CN XI), Hypoglossal (CN XII)

Question 65

Which cranial nerves carry both sensory and motor fibers?

Answer 65

Trigeminal (CN V), Facial (CN VII), Glossopharyngeal (CN IX), Vagus (CN X)

Question 66

Which cranial nerves carry parasympathetic fibers?

Answer 66

Oculomotor (CN III), Facial (CN VII), Glossopharyngeal (CN IX), Vagus (CN X)

Question 67

What is the function of the trochlear nerve (CN IV)?

Answer 67

Controls the superior oblique muscle for downward and inward eye movement

Question 68

What is the main sensory function of the glossopharyngeal nerve (CN IX)?

Answer 68

Taste and sensation from the posterior one-third of the tongue

Question 69

What is the motor function of the vagus nerve (CN X)?

Answer 69

Innervation of pharyngeal and laryngeal muscles for swallowing and voice production