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Human Anatomy > Spinal Cord and Spinal Nerves > Flashcards

Spinal Cord and Spinal Nerves Flashcards

1
Q

nerve cell bodies arranged in areas called hors form ____

A

gray matter in the spinal cord

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2
Q

bungles of myelinated axons called tracts arranged as ascending (sensory) and descending (motor) tracts form ____

A

white matter in the spinal cord

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3
Q

organization of grey matter:

most posterior structures are sensory

A

posterior gray horns

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4
Q

organization of grey matter:

visceral motor nuclei (organs)

A

lateral gray horns

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5
Q

organization of grey matter:

most anterior structures are motor

A

anterior gray horns

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6
Q

What horns of the spinal cord are composed of sensory neuron cell bodies?

A

dorsal

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7
Q

most superficial layer of meninges

A

dura mater

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8
Q

meningeal layer adhered to the internal surface of the skull

A

endosteal dura mater

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9
Q

most superficial meningeal layer surrounding the spinal cord

A

meingeal dura mater

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10
Q

intermediate layer of meninges

A

arachnoid mater

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11
Q

space between arachnoid mater and pia mater

A

subarachnoid space

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12
Q

CSF circulates in the ____ space

A

subarachnoid

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13
Q

most deep layer of meninges

A

pia mater

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14
Q

meningeal layer adhered to the surface of the brain & spinal cord

A

pia mater

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15
Q

formed by nerve cell bodies arranged in areas called ganglia

A

gray matter in spinal nerves

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16
Q

Dorsal root ganglia are composed of ____.

A

sensory nerve cell bodies

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17
Q

formed by bundles of myelinated axons called nerves arranged in groups called plexuses

A

white matter in spinal nerves

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18
Q

branches of spinal nerves:

sensation of the back and deep back muscles

A

dorsal rami

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19
Q

branches of spinal nerves:

sensation and movement of the rest of the body (other than the back and deep back muscles)

A

ventral rami

20
Q

__ pairs of spinal nerves:

\_\_ cervical pairs
\_\_ thoracic pairs
\_\_ lumbar pairs
\_\_ sacral pairs
\_\_ coccygeal
A

31 pairs of spinal nerves:

8 cervical pairs
12 thoracic pairs
5 lumbar pairs
5 sacral pairs
1 coccygeal
21
Q

the adult spinal cord ends at the ____ vertebral level

A

L2

22
Q

nerves hanging below spinal cord

A

cauda equina

23
Q

functional components of spinal nerves:

dorsal root

A

sensory only

24
Q

functional components of spinal nerves:

ventral root

A

motor only

25
Q

functional components of spinal nerves:

spinal nerve

A

mixed nerve

26
Q

functional components of spinal nerves:

dorsal ramus

A

mixed nerve

27
Q

functional components of spinal nerves:

ventral ramus

A

mixed nerve

28
Q

spinal nerve connective tissue covering:

outer layer that becomes continuous with the dura mater

A

epineurium

29
Q

spinal nerve connective tissue covering:

layer surrounding a fascicle (a bundle of axons)

A

perineurium

30
Q

spinal nerve connective tissue covering:

layer surrounding a single axon

A

endoneurium

31
Q

automatic, stereotyped response to stimulus

A

reflex

32
Q

a response to a withdrawal reflex (left knee extends as right knee reflexes

A

crossed extensor reflex

33
Q

Stimulating muscle spindles produces a _______ reflex.

A

stretch reflex

34
Q

reflexive extension of the toes in neonates when the plantar surface is stroked

A

Babinski’s

35
Q

area of skin supplied by one pair of spinal nerves

A

dermatome

36
Q

bundle of nerves that supply particular region of the body

A

nerve plexus

37
Q

four nerve plexuses:

A

cervical, brachial, lumbar, sacral

38
Q

only spinal nerves that do not form a plexus

A

thoracic

39
Q

nerve from cervical plexus that supplies the respiratory diaphragm (C1-C3)

A

phrenic nerve

40
Q

major nerves of brachial plexus:

A

musculocutaneous, median, ulnar, radial, axillary

41
Q

nerve plexus that supplies the UE

A

brachial

42
Q

major nerves of lumbar plexus:

A

femoral and obturator

43
Q

spinal cord enlargement that supplies the LE

A

lumbar

44
Q

a nerve of the lumbar plexus that supplies the LE

A

femoral

45
Q

major nerves of sacral plexus:

A

sciatic, pudendal, gluteal

46
Q

a nerve in the sacral plexus that supplies the LE; largest nerve in the body

A

sciatic nerve

47
Q

components/major branches of sciatic nerve

A

tibial branch and common peroneal branch

Human Anatomy (24 decks)

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