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Anat 1 > Spinal Cord > Flashcards

Spinal Cord Flashcards

1
Q

What are the 3 major subdivisions of the somite?

A

1 dermatome
2 myotome
3. Sclerotome

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2
Q

What is the dermatome derivative?

A

Dermis

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3
Q

What is the myotome derivative?

A

Muscle

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4
Q

What is the sclerotome derivative?

A

Skeleton

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5
Q

Dermatome is the area of skin supplied with what fibers and by what singular root?

A

Supplied with afferent nerve fibers by a single posterior root

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6
Q

Myotome are all the muscles that are innervated by what singular root?

A

Single efferent anterior root

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7
Q

T/F: Most muscles are compose on only one myotome?

A

F. Most muscles are composed of MORE THAN ONE myotome

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8
Q

Cervical enlargement is what region of the spinal cord?

A

C3-T1

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9
Q

Lumbar enlargement is what spinal cord region?

A

L1-S2

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10
Q

Where does the conus medullaris end?

A

L2

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11
Q

What are the 3 plexuses and there region of the spinal cord?

A 
Cervical = C1-C4
Brachial = C5-T1
Lumbosacral = L1-S4
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12
Q

What are the lumbar region 3 enlargements?

A

Conus equina, filum terminale, and conus medullaris

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13
Q 
How many spinal nerve for:
Cervical
Thoracic
Lumbar
Sacral 
Coccygeal
A 
Cervical = 8
Thoracic = 12
Lumbar = 5
Sacral = 5
Coccygeal = 1
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14
Q

On a spinal cord cross-section, what is the area of gray matter called?

A

Horns

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15
Q

On the spinal cord cross-section, what is the area of white matter called?

A

Columns

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16
Q

The dorsal root carries what type of fibers?

A

Afferent

17
Q

Ventral root carries what type of fibers?

A

Efferent

18
Q

Is the dorsal root associated with a ganglion? If so, what is the name of it?

A

Yes with the dorsal root ganglion (cell bodies of afferent neurons)

19
Q

Spinal nerve carries what type of fibers?

A

Mixture of afferent and efferent fibers, visceral and somatic, and proprioceptive

20
Q

Autonomic rami contains what type of communicans?

A

White and gray ramus communicans

21
Q

The primary rami contain what type of nerves?

A

Dorsal and ventral

22
Q

The dura mater is what layer?

A

Tough outer layer

23
Q

The subarachnoid space contains what kind of fluid?

A

CSF

24
Q

The pia mater is what layer?

A

Delicate innermost layer

Anat 1 (19 decks)

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