Unit 4 spinal cord anatomical fetures and structures

Question 1

Where does the spinal cord extend to?

Answer 1

Extends from the medulla to the vertebral level L1-L2

Question 2

After the spinal cord what is it?

Answer 2

Cauda equina - bundle of nerve roots

At its inferior end, an extension of the pia matter, the filum terminale, loosely anchors the cord to the coccyx

Question 3

How many regions is the spinal cord divided into and what are they called?

Answer 3

4
Cervical
Thoracic
Lumbar
Sacral

Question 4

What does each region have?

Answer 4

• Divided into segments
• Gives rise to a bilateral pair of spinal nerves
• the spinal cord does not appaer the same at each level

Question 5

You said the spinal cord ends at L1 of the vertebral column…. but then showed a cross section of sacral spinal cord?

Answer 5

Spinal cord segmental levels are defined by their roots but are not always situated at the cooresponding vertebral levels

Question 6

Which region is this cross section from?

Answer 6

Sacral

Question 7

Which region are these cross section from?

Answer 7

left: thoracic
Right: cervical

Question 8

Which region is this cross section from?

Answer 8

lumbar

Question 9

what is the dorsal horn related to?

Answer 9

afferent
sensory information

Question 10

What is the ventral horn related to?

Answer 10

efferent
motor information