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Flashcards in Neuraxial Anatomy Deck (10)
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1

CSF formed mainly where and of what location in ventricles?

Choroid Plexus of the lateral, third and fourth ventricles.

2

Contained in the epidural space

Fat

Lymphatics

Blood vessels

3

Epidural space boundaries

Cranially: 

Caudally: 

Anteriorly: 

Laterally: 

Posteriorly

Epidural space boundaries

Cranially: Foramen magnum

Caudally: sacrococcygeal ligament

Anteriorly: posterior longitudinal ligament

Laterally: Pedicles

Posteriorly: both Ligamentum flavum and vertebral lamina.

4

Depth of epidural space is maximal and is how many mm at L2 midline

about 6 mm

0.6 cm

5

Epidural space depth at midthoracic region

4-5 mm

6

Epidural space is minimal where in the spine

Lumbar and cervical enlargements encroach on the epidural space

T9-T12 and C3-T2, respectively

roughly 3mm ligamentumflavum and dura

7

Anatomical limitations of epidural injection.

Injected fluid generally communicates freely throughout the space from the

rostral limit at the foramen magnum to

sacral hiatus caudally.

8

Trivia time!

It is speculated the epidural space is divided into 2 segments that may explain (with existing controversies) a unilateral block or difficulty threading cath into epidural space.  What is the name of the connective tissue band that "exists" from dura to ligamentum flavum dividing the posterior epidural space into two compartment.

plica mediana dorsalis

9

Largest anastomotic link the _____ _____ (artery of _______), arises from the aorta in the lower thoracic or upper lumbar region.

radicularis magna

"artery of Adamkiewicz"

this artery is most commonly on the left and enters vertebral canal thru the L1 intervertebral foramen.

Critical to blood supply of the lower 2/3 of the spinal cord. Damage during aorta sx (AAA) = BLE motor loss = anterior spinal artery syndrome!

10

Drains the contents of the vertebral canal.

Vascular component

Internal vertebral venous plexus