Question 1

Which of the following structures is responsible for anchoring the spinal cord to the coccyx, thereby preventing excessive movement of the spinal cord within the vertebral canal?

Accepted Answer

Filum terminale

Question 2

A patient presents with loss of sensation and motor control in the skin and muscles of the anterior forearm and thumb abduction. Which nerve is most likely affected?

Accepted Answer

Radial nerve

Question 3

During a lumbar puncture, cerebrospinal fluid (CSF) is withdrawn from which space?

Accepted Answer

Subarachnoid space

Question 4

Which of the following best describes the function of the dorsal root ganglion?

Accepted Answer

Contains cell bodies of unipolar sensory neurons

Question 5

A patient is unable to abduct their arm at the shoulder and has lost sensation over the lateral shoulder. Which nerve is most likely damaged?

Accepted Answer

Axillary nerve

Question 6

Which of the following statements about the meninges is correct?

Accepted Answer

The pia mater adheres tightly to the surface of the spinal cord

Question 7

Which spinal cord enlargement supplies nerves to the lower limbs?

Accepted Answer

Lumbar enlargement

Question 8

A patient with shingles experiences pain and a rash along a specific strip of skin. This area is best described as a:

Accepted Answer

Dermatome

Question 9

Which of the following best describes the function of the anterior (ventral) root of a spinal nerve?

Accepted Answer

Carries motor commands out of the spinal cord

Question 10

Which of the following is a correct sequence for the five steps in a simple neural reflex arc?

Accepted Answer

Arrival of stimulus → Activation of sensory neuron → Information processing → Activation of motor neuron → Response by effector

Question 11

Which of the following best explains why the spinal cord ends at the level of the L1-L2 vertebrae in adults, even though the vertebral column continues further?

Accepted Answer

The vertebral column grows more rapidly than the spinal cord during development

Question 12

A patient is unable to flex their thigh at the hip and extend their knee. Which nerve plexus is most likely involved?

Accepted Answer

Lumbar plexus

Question 13

Which of the following best describes a monosynaptic reflex?

Accepted Answer

A reflex in which the sensory neuron synapses directly onto the motor neuron

Question 14

Which of the following is true regarding the white matter of the spinal cord?

Accepted Answer

It consists of myelinated and unmyelinated axons organized into columns

Question 15

A patient presents with loss of motor control in the flexor muscles of the forearm and digits, as well as sensory loss from the lateral surface of the palm. Which nerve is most likely affected?

Accepted Answer

Median nerve

Question 16

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

Accepted Answer

Carries sensory and motor information to and from the skin and muscles of the back

Question 17

Which of the following best describes the divergence circuit pattern in neuronal pools?

Accepted Answer

Spreads stimulation to many neurons or neuronal pools in the CNS

Question 18

Which of the following is a function of the stretch reflex?

Accepted Answer

Triggers contraction of a muscle in response to sudden stretching

Question 19

If a patient has damage to the anterior gray horn of the spinal cord, which function is most likely to be impaired?

Accepted Answer

Motor control of skeletal muscles

Question 20

Which of the following equations correctly represents the number of spinal nerves in each region, given that there are 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal spinal nerve?

Accepted Answer

$8 + 12 + 5 + 5 + 1 = 31$

Study Guide: Anatomy and Physiology of the Spinal Cord and Reflexes

Study Guide - Practice Questions

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