Question 1

Which structure anchors the spinal cord and prevents superior-inferior movement within the vertebral canal?

Accepted Answer

Filum terminale

Question 2

A patient presents with loss of sensation in a specific region of skin. Which anatomical concept best explains this phenomenon?

Accepted Answer

Dermatome

Question 3

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

Accepted Answer

Processing information and housing neuron cell bodies

Question 4

During a lumbar puncture, the needle is inserted into which space to collect cerebrospinal fluid (CSF)?

Accepted Answer

Subarachnoid space

Question 5

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

Accepted Answer

It is divided into posterior, lateral, and anterior columns

Question 6

A patient suffers a traumatic injury that damages the ventral root of a spinal nerve. Which function is most likely to be impaired?

Accepted Answer

Motor control of skeletal muscles

Question 7

Which of the following best describes a monosynaptic reflex?

Accepted Answer

It is the fastest reflex arc due to a direct connection between sensory and motor neurons

Question 8

Which layer of connective tissue directly surrounds each individual axon within a peripheral nerve?

Accepted Answer

Endoneurium

Question 9

Which of the following spinal cord structures contains the cell bodies of sensory neurons?

Accepted Answer

Dorsal root ganglion

Question 10

A patient is unable to sweat and experiences heat intolerance after a spinal cord injury. Which type of nerve fibers are most likely affected?

Accepted Answer

Autonomic (visceral) fibers

Question 11

Which of the following best describes the cauda equina?

Accepted Answer

A bundle of nerve roots extending from L2 to S5

Question 12

Which of the following is a correct pathway for sensory information entering the spinal cord?

Accepted Answer

Dorsal root → dorsal horn → ascending tract

Question 13

Which of the following is a function of the anterior white commissure in the spinal cord?

Accepted Answer

It allows myelinated axons to cross from one side of the spinal cord to the other

Question 14

Which of the following best describes the difference between a nerve plexus and a dermatome?

Accepted Answer

A nerve plexus is a network of intersecting nerves, while a dermatome is a region of skin supplied by a single spinal nerve

Question 15

Which of the following equations correctly represents the relationship between the number of spinal nerve pairs and their regional distribution?

Accepted Answer

$$C8 + T12 + L5 + S5 + Co1 = 31$$

Question 16

Which of the following is TRUE regarding the withdrawal (flexor) reflex?

Accepted Answer

It involves reciprocal inhibition of antagonistic muscles

Question 17

Which of the following best describes the function of the dorsal root of a spinal nerve?

Accepted Answer

It carries only sensory axons

Question 18

A patient with damage to the anterior horn of the spinal cord would most likely experience which of the following symptoms?

Accepted Answer

Muscle weakness or paralysis

Question 19

Which of the following best describes the difference between the gray ramus communicans and the white ramus communicans?

Accepted Answer

Gray ramus contains unmyelinated axons; white ramus contains myelinated axons

Spinal Cord Anatomy and Reflexes: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions