Question 1

Which structure within the spinal cord contains cerebrospinal fluid and is located within the gray commissure?

Accepted Answer

Central canal

Question 2

A patient suffers damage to the anterior (ventral) root of a spinal nerve. Which function is most likely to be impaired?

Accepted Answer

Motor output to skeletal muscles

Question 3

Which of the following correctly lists the protective structures of the spinal cord from most external to most internal?

Accepted Answer

Vertebrae, epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater

Question 4

The spinal cord segment responsible for the cervical enlargement is located between which vertebral levels?

Accepted Answer

C3-T1

Question 5

Which of the following nerves arises from the cervical plexus and is essential for breathing by innervating the diaphragm?

Accepted Answer

Phrenic nerve

Question 6

A spinal cord injury at the level of L1/L2 would most likely affect which anatomical feature?

Accepted Answer

Conus medullaris

Question 7

Which of the following statements about spinal nerves is correct?

Accepted Answer

Spinal nerves are mixed, containing both motor and sensory fibers

Question 8

The brachial plexus gives rise to all of the following nerves EXCEPT:

Accepted Answer

Femoral nerve

Question 9

Which spinal nerve segment does NOT form a plexus but instead forms intercostal nerves?

Accepted Answer

T2-T12

Question 10

A patient presents with loss of sensation in the posterior part of the body. Which structure is most likely damaged?

Accepted Answer

Posterior ramus

Question 11

Which of the following best describes the function of the gray commissure in the spinal cord?

Accepted Answer

It connects the gray matter on each side of the spinal cord

Question 12

If the subarachnoid space is punctured during a lumbar puncture, which substance is most likely to be withdrawn?

Accepted Answer

Cerebrospinal fluid

Question 13

Which equation best represents the number of spinal nerves arising from the spinal cord?

Accepted Answer

$$N = 31$$

Question 14

A patient has a herniated disc compressing the posterior (dorsal) root ganglion. What is the most likely symptom?

Accepted Answer

Loss of sensory function

Question 15

Which nerve is the largest in the body and arises from the sacral plexus?

Accepted Answer

Sciatic nerve

Question 16

Which of the following is TRUE regarding the filum terminale?

Accepted Answer

It connects the spinal cord to the coccyx

Question 17

Which column of white matter is located between the posterior horn and the posterior median sulcus?

Accepted Answer

Posterior white column

Question 18

A patient is unable to flex their forearm. Which nerve from the brachial plexus is most likely damaged?

Accepted Answer

Musculocutaneous nerve

Question 19

Which of the following best describes the cauda equina?

Accepted Answer

A bundle of nerve roots resembling a horse's tail

Question 20

If a patient has damage to the lumbar plexus, which nerve is most likely affected?

Accepted Answer

Femoral nerve

Chapter 13 Objectives

Study Guide - Practice Questions