Deck 1

Question 1

What is the anatomical/histological substrate of the enlargements of the spinal
cord?

Answer 1

1. Cervical enlargement, C5-T1, gives rise to brachial plexus, for the innervation of upper extremities.
2. Lumbosacral enlargement, L1 - S3, gives rise to lumbosacral plexus, for innervation of upper extremities.

Question 2

At which vertebral level is the medullary cone located in adults?

Answer 2

L1 - L2

Question 3

What sort of nerve fibers travel in the anterior root?

Answer 3

Motor efferent fibers: Somatomotor and Visceromotor

Question 4

What sort of nerve fibers travel in the posterior root?

Answer 4

Sensory afferent fibers: Somatosensory and Viscerosensory

Question 5

Which cisterns are used for CSF withdrawal?

Answer 5

Cisterna magna
Lumbar cistern

Question 6

What are the names of (both potential and real) spaces between the layers of the spinal meninges?

Answer 6

Epidural space
Subdural space
Subarachnoid space

Question 7

Which pathways travel in the anterior funiculus?

Question 8

Which pathways travel in the lateral funiculus?

Question 9

Which pathways travel in the posterior funiculus?

Question 10

What are Rexed laminae (spinal laminae of Rexed)?

Answer 10

Rexed laminae are a classification of regions within the spinal cord’s gray matter, organized into ten layers based on the types of neurons and their functions.

Question 11

How many Rexed laminae are found in the gray matter of spinal cord?

Answer 11

10

Question 12

Where does the 1st cervical nerve exit from the vertebral column?

Answer 12

Between the atlas and occipital bone

Question 13

Where does the 8th cervical nerve exit from the vertebral column?

Answer 13

Between C7 and T1

Question 14

What make up the cauda equina?

Answer 14

The cauda equina is made up of the bundle of spinal nerves and nerve roots that extend from the lower end of the spinal cord. Consists of: L2 - S5 nerve pairs and the coccygeal nerve.