Back Angio & Neuro

Question 1

3 vessels coming of aortic arch (in order)

Answer 1

1. Brachiocephalic trunk ( r.subclavian & R Common Carotid)
2. L common carotid aa.
3. Left Subclavian aa.

Question 2

What aa is visible in the floor of the suboccipital triangle

Answer 2

vertebral aa

Question 3

This aa is formed by 2 branches from each vertebral aa that unite in the midline to form a single aa traveling down SC

Answer 3

Anterior Spinal aa

Question 4

Branches of Thyrocervical trunk

Answer 4

1. Inferior Thyroid aa
2. Suprascapular aa
3. transverse cervical aa (may have a deep/superficial branch

Question 5

Axillary Artery borders and parts

Answer 5

Starts at end of 1st rib to T. Major

broken into parts 1,2,3 by Pec. Minor

Question 6

Branches of Axillary aa

Answer 6

1. Superior Thoracic aa
2. Thoracoacromial Trunk
3. Lateral Thoracic aa
4. Anterior Humeral Circumflex
5. Posterior Humeral Circumflex
6. Subscapular

Question 7

8 Sources of paraspinal aa

Answer 7

1. Vertebral aa
2. Ascending Cervical aa
3. Deep Cervical aa
4. Posterior Intercostal aa
5. Subcostal aa
6. Lumbar aa
7. Iliolumbar aa
8. Lateral Sacral aa

Question 8

Spinal branch

Answer 8

travel through IV foramen & produce anterior and posterior vertebral canal branches; ant y post. radicular and ant. y post, segmental medullary

Question 9

Segmental Medullary branches

Answer 9

can be either Ant. or post; branches from the Spinal branch and goes to either Anterior spinal aa or posterior spinal aa

Question 10

Ant. y Post, canal branches

Answer 10

come from spinal branch,
ant- supply marrow cavity
post- supply vertebral arch

Question 11

Radicular aa

Answer 11

branch from spinal branch, can tell not medullary bc dont go to spinal aa and can tell not canal bc stay in SC

Anterior- ventral roots of SC
Posterior- supplies dorsal root

Question 12

Spinal Meninges

Answer 12

Dura Mater-Arachnoid Mater- Pia Mater

Question 13

Dura mater spaces (2)

Answer 13

Epidural space- occupied by internal vertebral venous plexus and fat
Dura-Arachnoid interface- a potential space, shouldnt be any space here

Question 14

A long tube-shaped sheath surrounding the spinal cord lining the vertebral canal

Answer 14

Spinal Dural Sac

Question 15

Dural Root Sheath

Answer 15

lateral tapering extension of spinal dural mater that surround anterior and posterior roots

Question 16

Filum Terminale Externum

Answer 16

continuation of the filum terminale internum inferior to dural sac with an add’ll layer of dura- travels through sacral hiatus and inserts on the coccyx

Question 17

Arachnoid Mater

Answer 17

thin membranous intermediate layer, lines the dural sac and held there by CSF pressure

Question 18

Subarachnoid space

Answer 18

CSF filled space between arachnoid and pia mater

Question 19

Arachnoid trabeculae

Answer 19

delicate strands of CT that span the the subarachnoid space

Question 20

lumbar cistern

Answer 20

enlargement of the subarachnoid space inf. to the conus medullaris containing the cauda equina

Question 21

Filum terminale Internum

Answer 21

inf. continuation of pia mater inf to the conus medullaris; picks up layer of dura mater inf to the durl sac and becomes externum

Question 22

the 2 spinal enlargements

Answer 22

Cervical- c4-t1, brachial plexus and UE

LumboSacral-t11-s1. lumbar and sacral plexus & LE

Question 23

of spinal nerves

Answer 23

31 pairs- 8C, 12T, 5L, 5S and 1 coccygeal

Question 24

Posterior Rami of note

Answer 24

C1- Suboccipital-travels thru suboccipital triangle, innervates the suboccip muscles

C2- greater occipital-cutanous post. scalp

C3- Least occipital-cutanous and muscular innervation

Question 25

Posterior rami

Answer 25

branch into medial and lateral branches, innervate intrinsic back muscles (layers 4-6), both have cutaneous branch

Question 26

Medullary cone (conus medullaris)-

Answer 26

distal cone shaped terminal end of the SC typically begins tapering off at T12 and ends at L2