Protection of the CNS, Spinal Cord (Final) Flashcards Preview

Spring of 2012 > Protection of the CNS, Spinal Cord (Final) > Flashcards

Flashcards in Protection of the CNS, Spinal Cord (Final) Deck (16)
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0
Q

Duramater

A

Strongest
2 layer sheet of fibrous CT
Periosteal layer
Meningeal layer

1
Q

Meninges

A

3 CT membranes external to spinal cord
Contain CSF

Duramater
Arachnoid mater
Pia mater

2
Q

Periosteal layer

A

Superficial to skull periosteum

3
Q

Meningeal layer

A

Deep

Has dural septa (forms the partitions that limit movement of brain within cranium)

4
Q

Arachnoid mater

A

Middle layer
Above the layer is subdural space
Below is the subarachnoid space (both contain CSF)
Contains the brains largest blood vessels
Has arachnoid villi (projections that absorb CSF for recirculating via the venous system)

5
Q

Pia mater

A

Innermost layer made of very thin CT

Highly vascularized

6
Q

Spinal cord

A

Enclosed in the vertebral column
Extends from the Foramen magnum to the level of L1 or L2 (17 in.)
Provides two way conduction pathway to and from the brain

7
Q

Gross anatomy (spinal cord)

A

Comes to a tapered end called the conus modularis
The nerve rootlets called cauda equina extend down to the coccyx bone

Attached to the coccyx via an extension of the pia mater called filum terminale

8
Q

Functional anatomy

A
Dorsal root
Dorsal root ganglion
Dorsal horn
Lateral horn
Central horn
Ventral root
Central canal
9
Q

Dorsal root

A

Passageway for sensory/afferent fibers to enter CNS

Mostly unipolar and some bipolar

10
Q

Dorsal root ganglion

A

Contains cell bodies of sensory unipolar/bipolar neurons

11
Q

Dorsal horn

A

Cell bodies of interneurons that unipolar/bipolar neurons synapse with

12
Q

Lateral horn

A

Contains cell bodies of autonomic efferent fibers (to viscera)

13
Q

Ventral horn

A

Contains cell bodies of our somatic efferent NS fibers (to skeletal muscle)

14
Q

Ventral root

A

Passageway for all motor/efferent fibers to leave the CNS (to effectors)
Fibers from both the ventral and lateral horn exit here

15
Q

Central canal

A

Contains CSF

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