Question 1

Which cranial nerve is responsible for the sense of smell, and where do its fibers synapse?

Accepted Answer

Olfactory nerve (I); fibers synapse in the olfactory bulbs

Question 2

A patient presents with inability to move their right eye laterally. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (VI)

Question 3

Which cranial nerve passes through the optic canal and is responsible for vision?

Accepted Answer

Optic nerve (II)

Question 4

Damage to which nerve can result in loss of the pincer grasp, making it difficult to pick up small objects, as seen in carpal tunnel syndrome?

Accepted Answer

Median nerve

Question 5

Which spinal nerve plexus contains the phrenic nerve, and what is its primary function?

Accepted Answer

Cervical plexus; controls diaphragm for breathing

Question 6

A football player suffers a blow to the top of the shoulder, resulting in inability to abduct the arm. Which nerve is most likely injured?

Accepted Answer

Axillary nerve

Question 7

Which cranial nerve is the only one to extend beyond the head and neck region, and what is one of its major functions?

Accepted Answer

Vagus nerve (X); regulates activities of thoracic and abdominal viscera

Question 8

A patient presents with 'clawhand' deformity and difficulty making a fist. Which nerve is most likely affected?

Accepted Answer

Ulnar nerve

Question 9

Which equation correctly represents the number of spinal nerve pairs in the human body?

Accepted Answer

$8 + 12 + 5 + 5 + 1 = 31$

Question 10

Which nerve is most likely to be compressed in 'Saturday night paralysis,' resulting in wrist drop?

Accepted Answer

Radial nerve

Question 11

If the ventral root of a spinal nerve is damaged, which function will be primarily affected?

Accepted Answer

Motor output to skeletal muscles

Question 12

Which cranial nerve is responsible for facial expression and also carries taste sensation from the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (VII)

Question 13

A patient with a herniated disc compressing the lumbar plexus is most likely to experience which symptom?

Accepted Answer

Pain or numbness of the anterior thigh

Question 14

Which law states that any nerve serving a muscle that produces movement at a joint also innervates that joint and the skin over it?

Accepted Answer

Hilton's law

Question 15

Which cranial nerve is primarily responsible for hearing and balance?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 16

A patient cannot flex their hip or extend their knee after a pelvic injury. Which nerve is most likely damaged?

Accepted Answer

Femoral nerve

Question 17

Which cranial nerve innervates the trapezius and sternocleidomastoid muscles?

Accepted Answer

Accessory nerve (XI)

Question 18

If the phrenic nerve is severed, what is the most immediate life-threatening consequence?

Accepted Answer

Respiratory arrest due to diaphragm paralysis

Question 19

Which nerve is composed of the tibial and common fibular nerves and is the largest nerve in the body?

Accepted Answer

Sciatic nerve

Question 20

A patient presents with foot drop and inability to dorsiflex the foot after an injection in the buttock. Which nerve is most likely injured?

Accepted Answer

Sciatic nerve

Cranial Nerves: Structure, Function, and Classification

Study Guide - Practice Questions