4: Back Angiology And Neurology Flashcards
(39 cards)
Transection of the spinal cord at different levels and its effect
- C1-3: no function below head; respirator necessary for life
- C4-5: no function of limbs, respiration capable
- C6-8: loss of hand and variable upper limb function, possible use of wheelchair
- T1-9: paralysis of lower limbs
- T10-L1: some thigh function, may walk using leg braces
- L2-3: most lower limb function present, may walk using short leg braces
Five categories of structures that can be injuring, causing back pain
- Fibroskeletal structures
- Meninges
- Synovial joints
- Intrinsic back muscles
- Spinal nerves and nerve roots
What is considered fibroskeletal structures of the back
Periosteum, ligaments
Anterior and posterior spinal A’s: how are they formed?
By two branches of each vertebral A uniting in the midline (this is true for anterior and posterior spinal A’s)
What do sulcal A’s supply?
Anterior 2/3 of spinal cord
Another artery that can produce the posterior spinal A’s instead of the vertebral A
Posterior inferior cerebellar A
When the two vertebral arteries join in the cranial fossa, what artery is formed?
Basilar A
What does the inferior thyroid A supply?
Thyroid
Two muscles supplied by suprascapular A
Supraspinatus, infraspinatus
What nerve does the superficial branch of the transverse cervical artery travel with?
Spinal accessory N
What does the dorsal scapular A supply?
Levator scapulae, rhomboids
Path of the dorsal scapular A
Superior to scapula -> along medial border -> muscle innervation
What is the largest but shortest branch of the axillary A
Subscapular A
Muscle supplied by thoracodorsal A
Latissimus dorsi
What does the internal iliac broadly supply?
Pelvic viscera, gluteal region, perineum
What levels are equatorial branches and periosteal branches of spinal A’s found?
Every level of the vertebral column
What levels are spinal branches of spinal A’s found?
Every thoracic level
When are anterior and posterior segmental medullary A’s used in place of anterior and posterior radicular A’s
Sporadically near the C and L enlargements
Great anterior segmental medullary A
Much larger anterior segmental medullary A
Location of external vs internal vertebral venous plexuses
External: anteriorly and posteriorly on spinal column
Internal: in vertebral canal
What does the external vertebral venous plexus drain?
Basivertebral V’s
What does the internal vertebral venous plexus drain?
Anterior and posterior medullary and radicular V’s, basivertebral V’s
What do anterior and posterior medullary V’s drain and into what?
Anterior and posterior spinal V’s -> internal vertebral venous plexus
How many anterior and posterior spinal V’s are there?
Three each, typically freely communicating
