Question 1

Which of the following best explains why epidural anesthesia is administered into the epidural space rather than the subarachnoid space?

Accepted Answer

The epidural space is located between the dura mater and vertebrae, allowing anesthesia to numb spinal nerves without puncturing the dura mater.

Question 2

A patient is scheduled for a lumbar puncture to test for meningitis. At which vertebral level is the procedure most safely performed, and why?

Accepted Answer

Between L3 and L4, because the spinal cord has already terminated and only nerve roots are present, reducing risk of injury.

Question 3

Which structure anchors the spinal cord to the coccyx, and what is it composed of?

Accepted Answer

Filum terminale; composed of pia mater

Question 4

A patient presents with loss of sensation and motor function in a specific region of the skin. This is most likely due to damage of which structure?

Accepted Answer

A dermatome

Question 5

Which of the following best describes the difference between the dura mater in the spinal cord and in the brain?

Accepted Answer

The spinal dura mater is single-layered, while the cranial dura mater is double-layered.

Question 6

Which type of information is carried by the ascending nerve tracts in the spinal cord?

Accepted Answer

Sensory information from the body to the brain

Question 7

A patient suffers from paralysis of all four limbs after a spinal cord injury. What is the correct term for this condition?

Accepted Answer

Quadriplegia

Question 8

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

Accepted Answer

It is the site where axons cross from one side of the spinal cord to the other.

Question 9

Which nerve is most likely affected if a patient experiences tingling and numbness in the hand due to carpal tunnel syndrome?

Accepted Answer

Median nerve

Question 10

Which of the following statements about the cauda equina is correct?

Accepted Answer

It is a bundle of nerve roots extending below the spinal cord.

Question 11

Which of the following best describes the difference between the gray and white rami communicantes?

Accepted Answer

Gray ramus carries unmyelinated postganglionic neurons; white ramus carries myelinated preganglionic neurons.

Question 12

A patient is diagnosed with shingles. Which of the following best explains the pathophysiology of this condition?

Accepted Answer

It is caused by reactivation of the varicella-zoster virus, which remains dormant in the dorsal root ganglia.

Question 13

Which of the following is the correct order of structures a nerve impulse passes through in a typical reflex arc?

Accepted Answer

Sensory receptor → Sensory neuron → Integration center → Motor neuron → Effector

Question 14

Which of the following best describes the function of the phrenic nerve?

Accepted Answer

It innervates the diaphragm and is essential for breathing.

Question 15

Which of the following statements about spinal nerve roots is correct?

Accepted Answer

The dorsal root carries sensory neurons, and the ventral root carries motor neurons.

Question 16

A patient with polio experiences muscle weakness and paralysis. Which part of the spinal cord is primarily affected?

Accepted Answer

Destruction of cell bodies of motor neurons in the anterior horn

Question 17

Which of the following best describes a nerve plexus?

Accepted Answer

A network of interwoven nerve fibers formed by ventral rami

Question 18

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

Accepted Answer

Endoneurium

Question 19

Which of the following is true regarding the cervical and lumbar enlargements of the spinal cord?

Accepted Answer

They are regions where nerves supplying the limbs enter and exit the spinal cord.

Question 20

Which of the following best describes a monosynaptic reflex?

Accepted Answer

A reflex arc in which the sensory neuron synapses directly on the motor neuron, with only one synapse.

Spinal Cord Anatomy & Physiology Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions