Question 1

Which layer of the spinal meninges is directly adjacent to the spinal cord tissue and contains blood vessels?

Accepted Answer

Pia mater

Question 2

A patient receives an epidural injection for pain management. Which space is the medication delivered into?

Accepted Answer

Epidural space

Question 3

Which nerve plexus is responsible for innervating the pectoral girdle and upper limbs?

Accepted Answer

Brachial plexus

Question 4

What is the function of the denticulate ligaments formed by extensions of the pia mater?

Accepted Answer

Prevent side-to-side and downward movement of the spinal cord

Question 5

How many pairs of spinal nerves are found in the human body?

Accepted Answer

31

Question 6

Which of the following correctly describes the numbering convention for cervical spinal nerves?

Accepted Answer

Cervical nerves exit superior to their corresponding vertebra

Question 7

A lesion in the dorsal (posterior) ramus of a spinal nerve would most likely affect which function?

Accepted Answer

Sensory and motor innervation to the back

Question 8

Which structure forms the blood-nerve barrier in a peripheral nerve?

Accepted Answer

Perineurium

Question 9

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

Accepted Answer

It begins with the spinal cord and includes roots, trunks, divisions, cords, and nerves

Question 10

Which space is filled with cerebrospinal fluid and separates the arachnoid mater from the pia mater?

Accepted Answer

Subarachnoid space

Question 11

A patient presents with loss of sensation in a specific region of skin. Which term describes the area supplied by a single spinal nerve?

Accepted Answer

Dermatome

Question 12

Which of the following is NOT a function of the spinal meninges?

Accepted Answer

Transmission of electrical impulses

Question 13

Which of the following statements about the dura mater is correct?

Accepted Answer

It stabilizes the spinal cord within the vertebral canal

Question 14

Which of the following best describes the function of the white ramus communicans?

Accepted Answer

Carries myelinated preganglionic axons to the sympathetic ganglion

Question 15

Which of the following is a bundle of axons surrounded by the perineurium in a peripheral nerve?

Accepted Answer

Fascicle (fasciculus)

Question 16

If the pia mater is damaged, which of the following consequences is most likely?

Accepted Answer

Loss of blood supply to the spinal cord

Question 17

Which of the following is true about the subdural space?

Accepted Answer

It is only found in cadavers

Question 18

Which of the following is a real-world consequence of damage to the lumbar plexus?

Accepted Answer

Impaired movement and sensation in the lower limbs

Question 19

Which of the following best describes the filum terminale?

Accepted Answer

A structure formed by the pia mater at the inferior tip of the conus medullaris

Question 20

Which of the following is a multi-step process that occurs when a spinal nerve is damaged?

Accepted Answer

Loss of sensation and motor function in the region supplied by the nerve, potentially affecting multiple muscles and skin areas (dermatomes)

Spinal Cord, Spinal Meninges, Spinal Nerves, and Nerve Plexuses: Study Guide

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