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Spinal Cord Part 1 (Quiz 3) Flashcards

(27 cards)

1
Q

How many segments are there of the spinal cord?

A

31 segments

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1
Q

How many spinal nerves are there?

A

31 pairs

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2
Q

Where is the cervical enlargement?

A

C4-T1

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3
Q

Where is the lumbosacral enlargement?

A

L2-S3

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4
Q

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

A

conus medullaris

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5
Q

Which spinal region has the most segments and nerves?

A

thoracic (12 segments, 12 pairs of nerves)

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6
Q

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

A

thoracic region

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7
Q

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

A

L3, L1

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8
Q

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.

A

cauda equina

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9
Q

Which spinal region has the most gray matter? Why?

A

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

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10
Q

Which spinal region has the most white matter? Why?

A

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

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11
Q

Which spinal region has the least white matter?

A

sacral

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12
Q

What is AF?

A

anterior funiculus

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13
Q

What is AH?

A

anterior ventral horn

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14
Q

What is IG?

A

intermediate gray matter

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15
Q

What is LF?

A

lateral funiculus

16
Q

What is PF?

A

posterior funiculus

17
Q

What is PH?

A

posterior horn

18
Q

What is A?

A

anterior white commissure

19
Q

What is B?

A

anterior median fissure

20
Q

What is the DAVE SAME mnemonic?

21
Q

Are spinal nerves sensory, motor, or mixed?

22
Q

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

A

dorsal horns contain UMNS

ventral horns contain LMNs

23
Q

What are the 4 columns in a vertebral cross section?

A

1 ventral, 1 dorsal, and 2 lateral columns

24
Axon terminals are in _________ horn
dorsal
25
Are columns sensory, motor, or mixed?
mixed
26
The lateral corticospinal tract is in the ____________ columns
lateral