Spinal Cord Part 1 (Quiz 3)

Question 1

How many segments are there of the spinal cord?

Answer 1

31 segments

Question 1

How many spinal nerves are there?

Answer 1

31 pairs

Question 2

Where is the cervical enlargement?

Answer 2

C4-T1

Question 3

Where is the lumbosacral enlargement?

Answer 3

L2-S3

Question 4

The spinal cord ends caudally in a cone-shaped region, the _________________, at the level of the IVD between L1/L2

Answer 4

conus medullaris

Question 5

Which spinal region has the most segments and nerves?

Answer 5

thoracic (12 segments, 12 pairs of nerves)

Question 6

Which spinal region is the longest, heaviest, and largest region by volume?

Answer 6

thoracic region

Question 7

The conus medullaris is the tapering inferior end of the spinal cord, that occurs in a newborn at the level of the body of _____. In adults, it occurs at the level of the inferior border of ______. This is clinically relevant in determining the appropriate position for performing lumbar puncture in children and adults

Answer 7

L3, L1

Question 8

The _______________ is a bundle of spinal nerves and spinal nerve rootlets, consisting of the 2nd-5th lumbar nerve pairs, the 1st-5th sacral nerve pairs, and the coccygeal n.

Answer 8

cauda equina

Question 9

Which spinal region has the most gray matter? Why?

Answer 9

cervical and lumbar bc of the cervical and lumbosacral enlargements for the appendages

Question 10

Which spinal region has the most white matter? Why?

Answer 10

thoracic bc its mostly ascending and descending tracts here (nothing has to move horizontally)

Question 11

Which spinal region has the least white matter?

Answer 11

sacral

Question 12

What is AF?

Answer 12

anterior funiculus

Question 13

What is AH?

Answer 13

anterior ventral horn

Question 14

What is IG?

Answer 14

intermediate gray matter

Question 15

What is LF?

Answer 15

lateral funiculus

Question 16

What is PF?

Answer 16

posterior funiculus

Question 17

What is PH?

Answer 17

posterior horn

Question 18

What is A?

Answer 18

anterior white commissure

Question 19

What is B?

Answer 19

anterior median fissure

Question 20

What is the DAVE SAME mnemonic?

Answer 20

Question 21

Are spinal nerves sensory, motor, or mixed?

Answer 21

mixed

Question 22

Dorsal and ventral horns are grey matter. What is the difference between dorsal and ventral horns in terms of neurons?

Answer 22

dorsal horns contain UMNS

ventral horns contain LMNs

Question 23

What are the 4 columns in a vertebral cross section?

Answer 23

1 ventral, 1 dorsal, and 2 lateral columns

Question 24

Axon terminals are in _________ horn

Answer 24

dorsal

Question 25

Are columns sensory, motor, or mixed?

Answer 25

mixed

Question 26

The lateral corticospinal tract is in the ____________ columns

Answer 26

lateral