Question 1

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 2

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

Accepted Answer

Dermatome

Question 3

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

Accepted Answer

Carries information from place to place

Question 4

During a lumbar puncture, cerebrospinal fluid (CSF) is withdrawn from which space?

Accepted Answer

Subarachnoid space

Question 5

Which nerve of the cervical plexus is responsible for controlling the diaphragm?

Accepted Answer

Phrenic nerve

Question 6

A patient with carpal tunnel syndrome is most likely experiencing compression of which nerve?

Accepted Answer

Median nerve

Question 7

Which of the following spinal cord structures contains somatic and visceral sensory nuclei?

Accepted Answer

Posterior horns

Question 8

Which type of neuronal pool circuit allows a single neuron to spread information to multiple neurons, commonly seen in sensory pathways?

Accepted Answer

Divergence

Question 9

Which equation best represents the relationship between the number of synapses and the speed of a reflex response?

Accepted Answer

$$t_{reflex} \propto n_{synapses}$$

Question 10

Which of the following is TRUE regarding the tendon reflex?

Accepted Answer

It inhibits muscle contraction to prevent tendon damage

Question 11

A patient steps on a sharp object and immediately lifts their foot while simultaneously straightening the opposite leg. Which reflexes are involved?

Accepted Answer

Flexor and crossed extensor reflexes

Question 12

Which of the following best describes the role of gamma efferents in the muscle spindle reflex?

Accepted Answer

They adjust the sensitivity of intrafusal fibers

Question 13

Which of the following is a characteristic of polysynaptic reflexes?

Accepted Answer

Can activate muscles in multiple areas

Question 14

Which equation correctly represents the relationship between the number of spinal cord segments involved ($$n_{segments}) $$and the complexity of a polysynaptic reflex ($$C_{reflex}$$)?

Accepted Answer

$$C_{reflex} \propto n_{segments}$$

Question 15

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

Accepted Answer

Production of cerebrospinal fluid

Question 16

Which of the following best explains why the Babinski reflex is considered abnormal in adults?

Accepted Answer

It suggests damage to the central nervous system

Question 17

Which nerve plexus supplies the muscles and skin of the anterior thigh and medial leg?

Accepted Answer

Lumbar plexus

Question 18

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

Accepted Answer

It is organized into columns containing tracts

Question 19

Which of the following is TRUE about the effect of higher brain centers on spinal reflexes?

Accepted Answer

They can facilitate, inhibit, or fine-tune reflex responses

Question 20

Which equation best represents the relationship between the frequency of action potentials ($$f_{AP}) in $$sensory neurons and the degree of muscle stretch ($$S_{muscle}) in a $$muscle spindle?

Accepted Answer

$$f_{AP} \propto S_{muscle}$$

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

Guida di studio - Domande di pratica

Study guide - Flashcard