Spinal cord

Question 1

What are the 3 coverings of the spinal cord?

Answer 1

Dura
Arachnoid
Pia

Question 2

What is the outtermost covering of the spinal cord?

Answer 2

Dura

Question 3

What is the innermost covering of the spinal cord?

Answer 3

Pia. Very very delicate, cannot actually be removed

Question 4

The bulk of the spinal cord is made up of ________ between _____ and _____.

Answer 4

CSF between Pia and Arachnoid

Question 5

What is the term for the extension of pia down to the end of the spinal cord?

Answer 5

Filum terminale

Question 6

What is the term for the extension of dura down to the end of the spinal cord?

Answer 6

Coccygeal ligament

Question 7

What anchors the spinal cord laterally?

Answer 7

Denticulate ligament

Question 8

What are the grey matter layers of the dorsal horn?

Answer 8

I: Nucleus Posterior-Marginalis
II: Substantia Gelatinosa (cat’s ear)
III-VI: Nucleus Proprius (cross hatch)
VII: Intermediate zone, nucleus dorsalis, Clarke’s nucleus

Question 9

What are layers I-VI of the dorsal horn grey matter involved in?

Answer 9

Pain response

Question 10

What does Clarke’s Nucleus give rise to?

Answer 10

Proprioception

Question 11

What are clusters of neurons in the ventral horn called? What do they do?

Answer 11

Lamina IX. Directly contact/control muscles

Question 12

At what levels do you find spinal cord enlargements of grey matter?

Answer 12

Cervical lower (upper limb control)
Lumbar (lower limb control)

Question 13

What does the anterior spinal cord artery supply?

Answer 13

Supplies the anterior 2/3 of the spinal cord

Question 14

What do the 2 posterior spinal cord arteries supply?

Answer 14

Posterior 1/3 of the spinal cord

Question 15

What artery supplies the majority of the spinal cord (inferior 2/3)?

Answer 15

The Great Radicular Artery of Adamkiewicz branched off the aorta