Question 1

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

Accepted Answer

It carries information from place to place via myelinated and unmyelinated axons.

Question 2

A patient presents with a loss of sensation in a specific region of skin on the lateral thigh. Which anatomical concept best explains this pattern of sensory loss?

Accepted Answer

The loss is due to damage to the corresponding dermatome supplied by a single pair of spinal nerves.

Question 3

Which meningeal layer is directly attached to the surface of the spinal cord and contains blood vessels supplying the cord?

Accepted Answer

Pia mater

Question 4

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

Accepted Answer

Anterior horns contain somatic motor nuclei.

Question 5

A person steps on a sharp object and immediately lifts their foot while shifting their weight to the other leg. Which neural circuit pattern is primarily responsible for this coordinated response?

Accepted Answer

Parallel processing

Question 6

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

Accepted Answer

It controls the diaphragm, essential for breathing.

Question 7

Which of the following is a characteristic of a monosynaptic reflex?

Accepted Answer

It involves a single synapse between a sensory and a motor neuron.

Question 8

A patient is diagnosed with carpal tunnel syndrome. Which nerve is most likely being compressed, and what is a common symptom?

Accepted Answer

Median nerve; numbness or tingling in the anterior hand

Question 9

Which of the following best explains the role of the Golgi tendon organ in the tendon reflex?

Accepted Answer

It inhibits muscle contraction to prevent tendon damage.

Question 10

Which of the following statements about the Babinski reflex is correct?

Accepted Answer

It is a normal response in infants and may indicate CNS damage in adults.

Question 11

Which of the following best describes the function of the anterior ramus of a spinal nerve?

Accepted Answer

It innervates the ventrolateral structures of the trunk and the limbs.

Question 12

Which of the following is a real-life example of an acquired reflex?

Accepted Answer

Braking a car during an emergency after years of driving

Question 13

Which of the following best describes the effect of reciprocal inhibition during a withdrawal reflex?

Accepted Answer

Flexor muscles contract while extensor muscles are inhibited.

Question 14

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

Accepted Answer

Posterior white columns are located between the posterior horns and the posterior median sulcus.

Question 15

A patient with shingles presents with a painful rash along a specific region of the skin. Which virus is responsible for this condition, and what anatomical structure is primarily affected?

Accepted Answer

Varicella-zoster virus; spinal nerve or spinal ganglion

Question 16

Which of the following best describes the function of the denticulate ligaments?

Accepted Answer

They anchor the pia mater to the arachnoid and dura mater, preventing lateral movement of the spinal cord.

Question 17

Which of the following is a characteristic of a polysynaptic reflex?

Accepted Answer

It involves at least one interneuron and can activate multiple muscle groups.

Question 18

Which of the following best explains how higher brain centers can inhibit spinal reflexes?

Accepted Answer

By creating inhibitory postsynaptic potentials (IPSPs) at reflex motor neurons

Question 19

Which of the following is the correct order of connective tissue layers surrounding a peripheral nerve, from outermost to innermost?

Accepted Answer

Epineurium, perineurium, endoneurium

Question 20

Which of the following best describes the function of the cauda equina?

Accepted Answer

It is a bundle of nerve roots extending below the conus medullaris.

Chapter 13: The Spinal Cord, Spinal Nerves, and Spinal Reflexes – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards