Spinal Cord and Meninges Flashcards

1
Q

Meninges

A
Membranes that envelope the central nervous system (spinal cord)
3 layers:
dura matter
arachnoid matter
pia matter
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2
Q

Dura Mater

A

outside layer of the spinal cord

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3
Q

Arachnoid mater

A

inside layer pressed against the dura mater

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4
Q

Pia Mater

A

centre of the spinal cord

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5
Q

Denticulate Ligament

A

Attach the pia mater to the dura and arachnoid mater

provide stability to the spinal cord from vertebral column movement

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6
Q

Space between dura mater and bone of the vertebrae

A

Epidural space

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7
Q

Space between dura and arachnoid mater from the pia mater

A

Subarachnoid space

- filled with CSF

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8
Q

Pia mater modification at the end of the spinal cord

A

Filum Terminale

- provides longitudinal support to the spinal chord

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9
Q

Where spinal chord ends

A

Medullary cone

- L2

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10
Q

S2

A
  • Dural Sac
    continuation of the dura mater inferior to the termination (caudal end) of the spinal cord (L2 vertebral level), surrounding the cauda equina, and filum terminale
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11
Q

Features past the spinal cord

A
Dural Sac (S2)
- surrounds the filum terminale, and the caudal equina

Cauda Equina

  • bundle of nerve “ROOTS”
  • horses tail

Filum Terminale
- modification of pia matter below spinal chord to add addition support

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12
Q

Formation of a spinal nerve

A

rootlets -> roots -> spinal nerve -> rami

  • ant. post. of both roots and rami
  • ant. + post. roots come together to form spinal nerve

Rami - plural
Ramus - singular

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13
Q

What exits the intervertebral foreman?

A

Spinal nerve

  • roots of spinal nerve come together before exiting the spinal cord
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14
Q

Formation of the spinal nerve INSIDE the dura mater

A

rootlets and roots (anterior + posterior)

-roots pierce through the dura mater

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15
Q

Posterior Rami innervate?

A

Deep back muscles and sensory to overlying skin

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16
Q

Application:

Epidural location?

A

Below L2

Outside of the dura mater - in the epidural space

17
Q

Sacral Cornua

A

two small processes projecting inferiorly on either side of the sacral canal (posterior)
- represents inferior articular processes of S5

18
Q

Sacral Hiatus

A

the opening into the vertebral canal in the midline of the dorsal surface of the sacrum between the laminae of the fifth sacral vertebra (posterior)

  • location for epidural injection