2.4 The Sections of the Spinal Cord

Question 1

Where is the Gray Matter located in the Spinal Cord?

Answer 1

Deeply

Question 2

Where is the White Matter located in the Spinal Cord?

Answer 2

Superficially

Question 3

At what level does the Spinal Cord end in Adults?

Answer 3

L1 / L2

Question 4

At what level does the Spinal Cord end in Children?

Answer 4

L3 / L4

Question 5

Is the Dorsal part of the Spinal Cord Anterior or Posterior?

Answer 5

Posterior

Question 6

Is the Ventral part of the Spinal Cord Anterior or Posterior?

Answer 6

Anterior

Question 7

How does White Matter stain?

Answer 7

Darkly

Question 8

How does Gray Matter stain?

Answer 8

Lightly

Question 9

What are the features of the Cervical Spinal Cord Sections?

Answer 9

1. A Wide, Oval shape
2. Little Gray Matter
3. Large amounts of White Matter

Question 10

What are the features of the Thoracic Spinal Cord Sections?

Answer 10

1. A Wide, Oval Shape

2. Lateral Horns present in the Gray Matter

Question 11

What are the features of the Lumbar Spinal Cord Sections?

Answer 11

1. Circular Shape
2. Large amounts of Gray Matter
3. Notable presence of White Matter

Question 12

What are the features of the Sacral Spinal Cord Sections?

Answer 12

1. Circular Shape
2. Very Large Amounts of Gray Matter
3. Very little White Matter

Question 13

If the Spinal Cord ends at L1 / L2, how is there a Sacral region of the Spinal Cord?

Answer 13

The Sacral Section refers to the part of the Spinal Cord where the Sacral Spinal Nerves emerge

Question 14

Which aspect of the Spinal Cord receives Sensory Information from the Peripheral Nervous System?

Answer 14

The Dorsal Horn

Question 15

Which aspect of the Spinal Cord provides Motor innervation to the Peripheral Nervous System?

Answer 15

The Ventral Horn

Question 16

Why does the size of the Ventral Gray Horn vary along the Spinal Cord?

Answer 16

As some areas may go to form a Plexus (e.g the Brachial or the Lumbar Plexus)

Question 17

What is the name of the hole in the middle of the Spinal Cord, and what does it contain?

Answer 17

The Central Canal contains Cerebrospinal Fluid

Question 18

Which White Matter Tract carries Motor Innervation from the Cerebral Cortex to the Lower Motor Neurons?

Answer 18

The Corticospinal Tract

Question 19

Where, on an image of the Spinal Cord, can the Corticospinal Tract be found?

Answer 19

The Anterior Part

Question 20

Where, on an image of the Spinal Cord, can the Spinothalmic Tract be found?

Answer 20

1. The Lateral Parts

2. The Posterior Part

Question 21

Through which Spinothalamic Tract is Pain, Temperature, and Gross Touch communicated in?

Answer 21

The Lateral Spinothalamic Tract, after crossing over at the level of the Spinal Cord

Question 22

Through which Spinothalamic Tract is Proprioception, Vibration, and Fine Touch communicated in?

Answer 22

The Posterior Spinothalamic Tract, and crosses over in the Medial Lemniscus in the Brainstem