08 26 Spinal cord and spinal nerves Flashcards Preview

Neurology 1- M2 > 08 26 Spinal cord and spinal nerves > Flashcards

Flashcards in 08 26 Spinal cord and spinal nerves Deck (15):
1

Describe what the spinal cord looks like at the cervicomedullary junction?

It has a pyramidal decussation

2

Describe what a cervical section of the spinal cord looks like

It has the thickest white matter. The grey matter has a lateral motor nuclei (limb muscles). Lissauer's tract can also be seen.

3

Describe what thoracic section of the spinal cord looks like?

smallest amount of white and grey matter. It has Lissauer's tract and a small lateral column. Small dorsal and ventral horns.

Intermediolateral cell coli -- preganglionic sympathetics

4

Describe what a lumbar section of the spinal cord looks like.

no lateral column
Large dorsal an dventral horns

5

Describe what as sacral section of the spinal cord looks like

mostly grey matter
Large ventral and dorsal horns
Innervate a large number of muscles.

6

What are the main blood sullies to the spinal cord

1. Anterior spinal artery
2. Posterior spinal arteries (2)
3. Vasocorona

7

Anterior spinal artery

- located in ventral median fissure
-comes off the vertebral artery
-supplies medullary arteries to reinforce blood supply
- supply anterior 2/3 of spinal cord with blood

8

Posterior spinal arteries

-located in posteriolateral sluci
-comes off the vertebral or posterior inferior cerebellar artery
-supplies 1/3 of spinal cord.

9

Vasocorona

series of branches form anterior and posterior spinal arteries that form a crown around the cord ( no anastomoses).

10

anterior and posterior radicular arteries

at each spinal level to send blood to roots and ganglion.

11

Great Artery of Adamkiewicz

unusually large medullary artery T9-L1 (left). Supplies majority of the lumbar and sacral spinal cord.

12

Where is the water shed area?

T4- T9 because of the Great Artery of Adamkiewicz. Area is susceptible to ischemia.

13

Are there any astomoses between blood supplies?

Posterior medullary artery --> posterior spinal artery

Anterior medullary artier with anastomose with anterior spinal artery

14

Spinal articular complex

anterior and posterior spinal arteries form a complex that surounds the spinal cord (anastomoses of 2 posterior and anterior artery)

15

Venous return of blood going to spinal cord?

plexus of veins located in the epidural space before reaching systemic circulation

- Batson's plexus