Question 1

Which connective tissue layer directly surrounds individual axons within a peripheral nerve?

Accepted Answer

Endoneurium

Question 2

A patient presents with a loss of sensation in the lateral portion of the foot. Which nerve is most likely affected?

Accepted Answer

Sural nerve

Question 3

Which of the following statements about dermatomes is correct?

Accepted Answer

Dermatomes are bilateral regions of skin supplied by a single pair of spinal nerves.

Question 4

Which nerve plexus is responsible for innervating the diaphragm?

Accepted Answer

Cervical plexus

Question 5

A person with carpal tunnel syndrome may experience sensory loss in the hand due to compression of which nerve?

Accepted Answer

Median nerve

Question 6

Which of the following is TRUE regarding the formation of nerve plexuses?

Accepted Answer

Only the anterior rami of spinal nerves form plexuses.

Question 7

A patient is unable to flex their elbow and has lost sensation on the lateral forearm. Which nerve is most likely damaged?

Accepted Answer

Musculocutaneous nerve

Question 8

Which nerve arises from the sacral plexus and divides into the common fibular and tibial nerves?

Accepted Answer

Sciatic nerve

Question 9

Which of the following best describes the function of the perineurium?

Accepted Answer

Divides the nerve into fascicles

Question 10

A patient develops a painful rash and blisters along a single dermatome. Which virus is most likely responsible?

Accepted Answer

Varicella-zoster virus

Question 11

Which of the following nerves is NOT a major branch of the lumbar plexus?

Accepted Answer

Radial nerve

Question 12

Which of the following best explains why recovery from a severed peripheral nerve is often incomplete?

Accepted Answer

Problems with axon alignment and regrowth

Question 13

Which nerve is the major motor and sensory nerve of the posterior thigh and lower leg?

Accepted Answer

Sciatic nerve

Question 14

Which of the following is a clinical use of mapping dermatomes?

Accepted Answer

To identify the location of spinal nerve injuries

Question 15

Which of the following is TRUE regarding the phrenic nerve?

Accepted Answer

It innervates the diaphragm

Question 16

A patient with a lesion affecting the posterior cord of the brachial plexus would most likely have deficits in which nerve?

Accepted Answer

Radial nerve

Question 17

Which of the following best describes a nerve plexus?

Accepted Answer

A network of interwoven anterior rami of spinal nerves

Question 18

Which nerve is commonly used for nerve grafts due to its sensory function in the lateral foot?

Accepted Answer

Sural nerve

Question 19

Which of the following is a correct pairing of plexus and region innervated?

Accepted Answer

Brachial plexus – upper limb

Question 20

Which of the following best describes the path of blood supply within a peripheral nerve?

Accepted Answer

Arteries and veins penetrate the epineurium and branch within the perineurium

Spinal Nerves, Nerve Plexuses, and Peripheral Nerve Distribution

Study Guide - Practice Questions