S2 Anatomy Exam 2: Spinal Cord Dissector

Front 1

Osteophytes (bone spurs) resulting from steoarthritis in the zygophophysial joint may do what?

Back 1

compress the spinal nerve at an intervertebral foramen

Front 2

What do the unicate processes of cervical vertebrae articulate with?

Back 2

with the body of the vertebra above in uncovertebral “joints” (of Luschka)

(may become sites of osteophyte formation to produce neck pain)

Front 3

The anulus fibrosus is thinner (posteriorly/anteriorly), predisposing to protrusion (bulging) or herniation (rupture) of the nucleus pulposus through the anulus in that direction

Back 3

posteriorly

Front 4

The support provided by the ________________ usually directs the protrusion or herniation of the anulus fibrosus in a posterolateral direction.

Back 4

midline posterior longitudinal ligament

Front 5

The valveless vertebral venous plexus communicates with veins within the ________ & __________, providing a pathway for the spread of cancer cells or infection to the vertebral column, spinal cord, and brain

Back 5

pelvic cavity and the thoracoabdominal region

Front 6

The subarachnoid space is enlarged below the termination of the spinal cord at Lv1 as the
_____________, which is accessed clinically to extract samples of CSF (lumbar puncture) or to inject anesthetic (spinal block).

Back 6

lumbar cistern

Front 7

The spinal cord may terminate as high as vertebra ___ or as low as ___ in the adult

(may be clinically important in patients with vertebral fractures)

Back 7

high as T12

low as L3

Front 8

What segmental artery is especially important for the blood supply of the lower 2/3 of the spinal cord, including the lumbosacral enlargement?

Back 8

the great (major) anterior segmental medullary artery (of Adamkiewicz)

Front 9

Where does the great (major) anterior segmental
medullary artery (of Adamkiewicz) arise from?

Back 9

left (65%) lower intercostal or upper lumbar artery

Front 10

occlusion or injury of the great (major) anterior segmental medullary artery (of Adamkiewicz) may result in..........

Back 10

the loss of voluntary movements in the lower portion of the trunk and the lower extremities (paraplegia).

Front 11

Occlusion of ___________ arteries reinforcing the
posterior spinal arteries, or a severe drop in systemic BP, would lead to loss of sensation (anesthesia)

Back 11

segmental medullary arteries

Front 12

The lumbar cistern occupied by the ____________ from Lv2 to Sv2 can be used to withdraw CSF or to inject anesthetic because the slender nerve roots roll away from the tip of the inserted needle

Back 12

cauda equina

Front 13

Where is a typical lumbar spinal puncture (lumbar puncture) performed?

Back 13

between the spinous processes of Lv3 and Lv4
or between Lv4 and Lv5

Front 14

The _______________ transecting the highest points of the right and left iliac crests usually passes through the Lv4 spinous process and is used as a landmark for lumbar punctures.

Back 14

supracristal plane

Front 15

An intervertebral disc that protrudes or herniates in the usual posterolateral direction typically compresses the nerve root descending to exit at the intervertebral foramen below the next vertebra down (traversing root) or at the same level (exiting root)?

Back 15

below the next vertebra down (traversing root)