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Spinal Anatomy I - Exam 1 > Spinal Cord > Flashcards

Flashcards in Spinal Cord Deck (20)
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1
Q

In horizontal view, what direction of the spinal cord tends to be largest?

A

transverse

2
Q

What are the spinal cord enlargement locations and the name given to each?

A

C3-T1, the cervical enlargement

T9-T12, the lumbar (lumbosacral) enlargement

3
Q

Where is the greatest transverse diameter of the spinal cord?

A

C6

4
Q

In which plane (or direction) will the diameter of the spinal cord decrease from C2-T1?

A

midsagittal or anterior-posterior plane

5
Q

What spinal nerves originate from the lumbar enlargement?

A

L1-S3 spinal nerves

6
Q

What is a generic cord level of origin - vertebral level combination for the lumbar enlargement?

A

L1, L2 cord levels in T9 vertebra
L3, L4 cord levels in T10 vertebra
L5, S1 cord levels in T11 vertebra
S2, S3 cord levels in T12 vertebra

7
Q

What is the caudal end of the spinal cord called?

A

conus medullaris

8
Q

What spinal nerves originate from the conus medullaris?

A

typically S4, S5, and Co1

9
Q

In which vertebral foramen will the conus medullaris typically be observed?

A

L1

10
Q

What is the name given to the nerve roots below L1?

A

cauda equina

11
Q

What is the continuation of pia mater below the conus medullaris called?

A

filum terminale internum

12
Q

What is the location and name given to the area where all meninges first converge at the caudal part of the vertebral column?

A

typically S2, the dural cul de sac

13
Q

Neural tissue has been identified in what part of the filum terminale?

A

proximal part of the filum terminale internum

14
Q

What is the fate of the neural tissue identified along the filum terminale internum?

A

it joins peripheral nerve roots of spinal nerves as high as L3 and as low as S4

15
Q

What does the neural tissue associated with the filum terminale externum appear to innervate?

A

lower limbs and the external anal sphincter

16
Q

The last arterial vasa corona creates what feature on an angiogram?

A

cruciate anastomosis

17
Q

What is the name given to the condensation of meninges below S2?

A

filum terminale externum

18
Q

What is the name given to the caudal attachment of the meninges?

A

coccygeal medullary vestige

19
Q

What is the name given to the condition in which the conus medullaris is located below L1 and filium terminale is thickened?

A

tethered cord syndrome

20
Q

What is the relationship between scoliosis and tethered cord syndrome?

A

it is suggested that the column will change normal curvatures to mitigate damage to the spinal cord