Exam 2 Part 1 Spinal Cord

Question 1

Superior boundary of the spinal cord

Answer 1

Foramen magnum

Question 2

Inferior boundary of the spinal cord

Answer 2

The disc b/t vertebrae levels L1-2 (cauda equina is found here)

Question 3

How many spinal nerve roots are there

Answer 3

31 on each side

Question 4

Each nerve will have a _____ & _____ roots, w/in the vertebral canal.

Answer 4

Dorsal & ventral

Question 5

The Bell-Megendi law states:

Answer 5

Dorsal roots contain sensory (afferent) fibers & ventral roots are motor (efferent) fibers. (we now know a few afferent fibers come through on the ventral root

Question 6

Cervical nerves C1- C8 are named for the bone ______

Answer 6

Below

ex. C4 exits IVF b/t C3 & C4 vertebrae

Question 7

Thoracic nerves T1- T12 vertebrae are named for the bone _____

Answer 7

Above

Ex. T6 exits b/t T6 & T7

Question 8

Lumbar nerves L1-L5 Named for bone ____

Answer 8

Above

EX. L1 exits b/t L1 & L2

Question 9

Sacral nerves S1 - S4 exit

Answer 9

The dorsal & ventral sacral foramina

Question 10

S5 exits:

Answer 10

@ the sacral hiatus

Question 11

Coccygeal nerve Co1 exits:

Answer 11

Sacral hiatus (could be missing)

Question 12

T/F During the first 3 months of embryonic development the cord and the vertebral column are approx. the same length?

Answer 12

True

Question 13

During the rest of gestation the vertebral column lengthens more rapidly than the cord. At birth the Co1 CORD level is typically @ the same level as the ______ vertebra

Answer 13

L1-L3

Question 14

By adulthood the Co1 level is found @ the ______ vertebral level.

Answer 14

L1-L2

Question 15

Tapering of the spinal cord is called the:

Answer 15

Cauda medullaris

Question 16

The roots for the lumbar, sacral & coccygeal nerves will run for an extended distance, below the cord making up the

Answer 16

Cauda equina

Question 17

Cranially the central canal is continuous with the

Answer 17

M.O and the 4th ventricle

Question 18

Inferiorly the central canal expands in the conus medullaris as a:

Answer 18

Terminal ventricle

Question 19

Terminal ventricle is found:

Answer 19

Inside the cord

Question 20

Lumbar cistern is:

Answer 20

Both filled w/ CSF and outside the cord