Question 1

Which of the following best describes the function of the cauda equina in the spinal cord?

Accepted Answer

It is a bundle of nerve roots that extend inferiorly from the conus medullaris to exit at their appropriate vertebral levels.

Question 2

A patient presents with loss of sensation on the medial aspect of the forearm and hand. Which spinal nerve is most likely affected?

Accepted Answer

C8

Question 3

Which of the following statements about the meninges of the spinal cord is CORRECT?

Accepted Answer

The arachnoid mater contains the subarachnoid space, which is filled with cerebrospinal fluid.

Question 4

Which pathway is responsible for transmitting discriminative touch and proprioceptive information to the brain?

Accepted Answer

Posterior funiculus–medial lemniscal pathway

Question 5

A patient is unable to dorsiflex and evert the foot after a fracture of the fibular neck. Which nerve is most likely injured?

Accepted Answer

Common fibular nerve

Question 6

Which of the following best describes a monosynaptic reflex?

Accepted Answer

A reflex arc in which the sensory neuron synapses directly with the motor neuron.

Question 7

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

Accepted Answer

Phrenic nerve

Question 8

Which of the following is TRUE regarding the organization of white matter in the spinal cord?

Accepted Answer

The anterior funiculus contains both ascending (sensory) and descending (motor) tracts.

Question 9

A patient with carpal tunnel syndrome is most likely to have compression of which nerve?

Accepted Answer

Median nerve

Question 10

Which of the following best explains why a lumbar puncture is performed below the level of L1 in adults?

Accepted Answer

The spinal cord ends at the inferior border of L1, reducing the risk of damaging it.

Question 11

Which of the following is a characteristic of the Golgi tendon reflex?

Accepted Answer

It prevents excessive muscle contraction by causing muscle relaxation.

Question 12

Which of the following spinal cord regions contains lateral horns?

Accepted Answer

Thoracic and upper lumbar (T1–L2)

Question 13

Which of the following best describes the function of the posterior root ganglion?

Accepted Answer

It contains cell bodies of sensory neurons.

Question 14

Which tract is responsible for transmitting voluntary motor commands to limb muscles for skilled movements?

Accepted Answer

Lateral corticospinal tract

Question 15

A patient with a herniated intervertebral disc compressing the sciatic nerve would most likely experience which symptom?

Accepted Answer

Extreme pain down the posterior thigh and leg

Question 16

Which of the following is TRUE regarding dermatomes?

Accepted Answer

Dermatomes can help localize damage to specific spinal nerves.

Question 17

Which of the following is a function of the rami communicantes?

Accepted Answer

They connect the spinal nerve to the sympathetic trunk ganglion.

Question 18

Which of the following best describes the withdrawal (flexor) reflex?

Accepted Answer

It is a polysynaptic reflex that pulls a body part away from a painful stimulus.

Question 19

Which nerve is the largest and longest in the body, and splits into the tibial and common fibular nerves?

Accepted Answer

Sciatic nerve

Question 20

Which of the following is a likely consequence of a hyperactive reflex accompanied by clonus?

Accepted Answer

Damage to the brain or spinal cord

The Spinal Cord and Spinal Nerves: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions