Nervous System Part 2 Flashcards

1
Q

Between the vertebrae and dura mater

A

Epidural space

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2
Q

○ Tough mater
○ Thick and strong layer, dense irregular
connective tissue
○ Extends to vertebra S2 (well beyond the
spinal cord)

A

Dura mater

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3
Q

Contains interstitial fluid

A

Subdural space

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4
Q

○ Resembles a spider’s web
○ Thin, avascular covering of loosely
arranged collagen and elastic fibers
○ Extends into subarachnoid space

A

Arachnoid mater

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5
Q

CSF circulates in this space

A

Subarachnoid space

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6
Q

○ Thin, delicate layer
○ Adheres to surface spinal cord (and
brain)
○ Contains blood vessels

A

Pia mater

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7
Q
○ Thickenings of pia mater
○ Fuse with arachnoid mater and dura
mater
○ Between the anterior and posterior
nerve of roots of spinal nerves
○ Suspend the spinal cord at the middle
○ Protects the spinal cord from sudden
displacement → shock
A

Denticulate ligaments

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8
Q

○ Long hollow needle inserted into the

subarachnoid space

A

Spinal tap/Lumbar puncture

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9
Q

where does spinal cord ends?

A

L2 (superior border)

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10
Q

until where do spinal meninges extend to?

A

extend to S2

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11
Q

shape of spinal cord

A

roughly oval

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12
Q

from and until where do the spinal cord in adults extends to?

A

Extends from medulla of brain to L2 superior border

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13
Q

from and until where do the spinal cord in newborns extends to?

A

Extends up to L3/L4

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14
Q

Arise from conus medullaris

A

Filum Terminale

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15
Q

Paths of communication between spinal cord and body regions

A

Spinal Nerves

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16
Q

Bundles of axons

A

roots

17
Q

Connects each spinal nerve to a
segment of the cord by even smaller
bundles of axons (rootlets)

A

Roots: Bundles of axons

18
Q

○ Contains only sensory axons

○ Each posterior root has a swelling, the posterior (dorsal) root ganglion - contains the cell bodies of sensory neurons

A

Posterior (dorsal) Roots & Rootlets

19
Q

this external anatomy of the spinal cord contains

only motor axons

A

Anterior (ventral) roots & rootlets

20
Q
○ Lumbar, sacral and coccygeal regions -
do not leave the vertebral column at
the same level they exit the cord
○ Their roots angle inferiorly alongside
the filum terminale
A

Spinal Cord shorter than vertebral column

21
Q

○ Extends inferior to end of spinal cord
○ Consists of roots of lumbar, sacral and
coccygeal spinal nerves

A

Cauda Equina (horse’s tail)

22
Q

Consists of white columns, myelinated axons of neurons

A

White matter