Question 1

Which structure contains the cell bodies of sensory neurons entering the spinal cord?

Accepted Answer

Dorsal root ganglion

Question 2

A patient presents with loss of sensation and muscle weakness in the anterior thigh. Which nerve plexus is most likely affected?

Accepted Answer

Lumbar plexus

Question 3

Which nerve is responsible for innervating the diaphragm and is critical for breathing?

Accepted Answer

Phrenic nerve

Question 4

The sciatic nerve is composed of which two nerves sheathed together?

Accepted Answer

Tibial and common fibular nerves

Question 5

Which of the following best describes the function of the dorsal rami of spinal nerves?

Accepted Answer

Innervate the intrinsic muscles of the back and dorsal skin

Question 6

A patient has a shingles outbreak along the T4 dermatome. Which virus is responsible for this condition?

Accepted Answer

Varicella-zoster virus

Question 7

Which nerve is most likely to be damaged if a patient cannot extend their wrist and fingers?

Accepted Answer

Radial nerve

Question 8

Which of the following is TRUE regarding the organization of the brachial plexus?

Accepted Answer

It is formed by the ventral rami of C5-T1

Question 9

Which nerve passes through the obturator foramen to innervate the medial thigh?

Accepted Answer

Obturator nerve

Question 10

Which of the following best describes a dermatome?

Accepted Answer

A segment of skin innervated by a single spinal nerve

Question 11

Which nerve is responsible for cutaneous sensation over the lateral forearm?

Accepted Answer

Musculocutaneous nerve

Question 12

A patient presents with loss of plantar flexion and sensation on the sole of the foot. Which nerve is most likely injured?

Accepted Answer

Tibial nerve

Question 13

Which of the following statements about the sympathetic division of the ANS is correct?

Accepted Answer

Sympathetic ganglia are located near the vertebral column

Question 14

Which nerve innervates the quadriceps femoris muscle group?

Accepted Answer

Femoral nerve

Question 15

Which of the following is a correct pathway for sympathetic preganglionic fibers?

Accepted Answer

They may ascend or descend in the sympathetic trunk before synapsing

Question 16

Which nerve is most likely to be affected in carpal tunnel syndrome, resulting in numbness of the lateral palm and first three fingers?

Accepted Answer

Median nerve

Question 17

Which of the following best describes the function of the rami communicantes?

Accepted Answer

They connect spinal nerves to the sympathetic trunk

Question 18

A patient has difficulty abducting the arm at the shoulder. Which nerve is most likely damaged?

Accepted Answer

Axillary nerve

Question 19

Which nerve provides cutaneous innervation to the medial aspect of the hand, including the little finger?

Accepted Answer

Ulnar nerve

Question 20

Which of the following is TRUE regarding the parasympathetic division of the ANS?

Accepted Answer

Preganglionic neurons are long and originate in the craniosacral region

Peripheral Nervous System: Spinal Nerves, Plexuses, and Special Senses

Study Guide - Practice Questions