Back Angio & Neuro Flashcards
3 vessels coming of aortic arch (in order)
- Brachiocephalic trunk ( r.subclavian & R Common Carotid)
- L common carotid aa.
- Left Subclavian aa.
What aa is visible in the floor of the suboccipital triangle
vertebral aa
This aa is formed by 2 branches from each vertebral aa that unite in the midline to form a single aa traveling down SC
Anterior Spinal aa
Branches of Thyrocervical trunk
- Inferior Thyroid aa
- Suprascapular aa
- transverse cervical aa (may have a deep/superficial branch
Axillary Artery borders and parts
Starts at end of 1st rib to T. Major
broken into parts 1,2,3 by Pec. Minor
Branches of Axillary aa
- Superior Thoracic aa
- Thoracoacromial Trunk
- Lateral Thoracic aa
- Anterior Humeral Circumflex
- Posterior Humeral Circumflex
- Subscapular
8 Sources of paraspinal aa
- Vertebral aa
- Ascending Cervical aa
- Deep Cervical aa
- Posterior Intercostal aa
- Subcostal aa
- Lumbar aa
- Iliolumbar aa
- Lateral Sacral aa
Spinal branch
travel through IV foramen & produce anterior and posterior vertebral canal branches; ant y post. radicular and ant. y post, segmental medullary
Segmental Medullary branches
can be either Ant. or post; branches from the Spinal branch and goes to either Anterior spinal aa or posterior spinal aa
Ant. y Post, canal branches
come from spinal branch,
ant- supply marrow cavity
post- supply vertebral arch
Radicular aa
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
Spinal Meninges
Dura Mater-Arachnoid Mater- Pia Mater
Dura mater spaces (2)
Epidural space- occupied by internal vertebral venous plexus and fat
Dura-Arachnoid interface- a potential space, shouldnt be any space here
A long tube-shaped sheath surrounding the spinal cord lining the vertebral canal
Spinal Dural Sac
Dural Root Sheath
lateral tapering extension of spinal dural mater that surround anterior and posterior roots
Filum Terminale Externum
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
Arachnoid Mater
thin membranous intermediate layer, lines the dural sac and held there by CSF pressure
Subarachnoid space
CSF filled space between arachnoid and pia mater
Arachnoid trabeculae
delicate strands of CT that span the the subarachnoid space
lumbar cistern
enlargement of the subarachnoid space inf. to the conus medullaris containing the cauda equina
Filum terminale Internum
inf. continuation of pia mater inf to the conus medullaris; picks up layer of dura mater inf to the durl sac and becomes externum
the 2 spinal enlargements
Cervical- c4-t1, brachial plexus and UE
LumboSacral-t11-s1. lumbar and sacral plexus & LE
of spinal nerves
31 pairs- 8C, 12T, 5L, 5S and 1 coccygeal
Posterior Rami of note
C1- Suboccipital-travels thru suboccipital triangle, innervates the suboccip muscles
C2- greater occipital-cutanous post. scalp
C3- Least occipital-cutanous and muscular innervation
