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OTD806 > Unit I Lec 9 > Flashcards

Unit I Lec 9 Flashcards

1
Q

Total number of spinal nerves/spinal cord segments

A

31

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2
Q

Number of cervical nerve segments

A

8

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3
Q

Number of thoracic nerve segments

A

12

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4
Q

Number of lumbar nerve segments

A

5

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5
Q

Number of sacral nerve segments

A

5

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6
Q

Number of coccygeal nerve segments

A

1

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7
Q

Spinal cord stops where

A

Around L1-L2

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8
Q

Term for nerves coming off spinal cord

A

nerve roots

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9
Q

Dorsal root is afferent or efferent

A

afferent, sensory

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10
Q

Ventral root is afferent or efferent

A

efferent, motor

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11
Q

Enlargement off dorsal root

A

dorsal root ganglia

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12
Q

Dorsal root and ventral root come together and form

A

spinal nerve

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13
Q

Spinal nerve is composed of what types of neurons

A

both sensory and motor

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14
Q

Spinal nerve spplits into what

A

ramii

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15
Q

Dorsal primary ramus innervates what

A

deep and lower back muscles

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16
Q

Ventral primary ramus does what

A

everything else but deep and lower back muscles

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17
Q

Braching network of intersecting nerves

A

nerve plexus

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18
Q

Ventral primary ramii form what

A

nerve plexi

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19
Q

Cervical plexus (C1-C4) comes from what rami

A

ventral primary rami

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20
Q

Brachial plexus (C5-T1) comes from what rami

A

ventral primary rami

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21
Q

Lumbosacral plexus (L1-S4) comes from what rami

A

ventral primary rami

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22
Q

Coccygeal plexus (S4,S5) comes from what rami

A

ventral primary rami

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23
Q

Spinal cord begins at what structure

A

foramen magnum

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24
Q

Spinal cord ends at what vertebra

A

L1-L2 in adults

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25
Q

Approx length of spinal cord in adults

A

58-60cm (23-24 in)

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26
Q

Spinal cord ends where in a baby

A

L3-L4

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27
Q

Term for “stuck” spinal cord in which spinal cord is lenghened

A

tethered cord

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28
Q

Feature at end of spinal cord where dorsal and ventral roots are elongated

A

cauda equina

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29
Q

Termination of spinal cord (shaped like a cone)

A

conus medullaris

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30
Q

Where does the dural sac end in the spinal cord

A

around S1, S2

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31
Q

Sac that contains CSF and holds cauda equina

A

dural sac

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32
Q

Location of cervical enlargement

A

C5-T1

33
Q

Why is there a cervical enlargement C5-T1)

A

location of brachial plexus, neurons for hands and arms

34
Q

Why is there a lumbar enlargement (L1-S4)

A

location of lumbosacral plexus, innervation of lower limbs

35
Q

String of pia mater that runs from conus medullaris to coccyx, holds spinal cord in place

A

filum terminale

36
Q

Term for tissue layer directly on the surface of spinal cord and dorsal/ventral roots

A

pia mater

37
Q

Superficial to the pia mater, what is the filmy layer of tissue

A

arachnoid mater

38
Q

Most superficial most durable layer of tissue, on spinal cord and also extends to roots

A

dura mater

39
Q

Number of pairs of denticulate ligaments on spinal cord

A

21

40
Q

Modifications of pia mater that form serrated arrangement along side of spinal cord ride between dirsal and ventral roots, attaches dura mater to spinal cord

A

denticulate ligaments

41
Q

Fluid in the subarachnoid space

A

cerebrospinal fluid (CSF)

42
Q

Space between dura mater and arachnoid space

A

potential space, layers typically stick together

43
Q

space above dura mater that contains fat and anterior and posteruir venous plexi to return blood to heart

A

epidural space

44
Q

Vein that drains blood in vertebral venus plexus to CVS

A

basivertebral vein

45
Q

Path of prostate cancer to invade spine

A

vertebral venus plexus

46
Q

Network of veins that drains epidural space

A

vertebral venus plexus

47
Q

White matter contains what portion of neuron

A

axons

48
Q

Grey matter contains what portion of neuron

A

cell bodies

49
Q

Three white columns in spinal cord

A

Dorsal, leteral, ventral white columns

50
Q

Another name for white column

A

Funniculus

51
Q

Three horns in spinal cord

A

Posterior, lateral, and anterior gray horns

52
Q

Dorsal gray column does what

A

sensory

53
Q

Lateral, ventral gray column does what

A

motor

54
Q

Term for gray matter that connects the horns

A

gray commissure

55
Q

Term for small hole in the gray commissure

A

central canal

56
Q

Central canal is left over from

A

fetal development of spinal cord

57
Q

Anterior white column is split by what on the anterior side of spinal cord

A

anterior median fissure

58
Q

Posterior white column is split by what

A

posterior median sulcus

59
Q

2 Vertebral arteries originate from what

A

subclavian arteries

60
Q

2 Vertebral arteries go where

A

posterior circulation of brain

61
Q

2 dorsal spinal arteries go where

A

along sides of spinal cord

62
Q

cauda equina arteries come from

A

2 dorsal spinal ateries

63
Q

lateral sacral arteries go where

A

circle around sacrum

64
Q

“feeder” arteries that keep arterial blood flowing down entire spinal cord

A

segmental arteries

65
Q

Dorsal spinal arteries supply blood to what portion of spinal cord

A

dorsal 1/3 of spinal cord approx

66
Q

On ventral side, how many ventral spinal arteries

A

1

67
Q

Ventral spinal artery travels where

A

ventral median sulcus

68
Q

Cauda equina arteries anastomos with what other arties to keep circulation

A

lateral sacral arteries

69
Q

Major feeder artery of spinal artery that originated almost always on left side, arises between T8-L1

A

Anterior medullary artery of adamkiewicz

70
Q

Damage to anterior medullary artery of adamkiewicz can cause what

A

paraplegia

71
Q

Ventral spinal artery supplies what portion of spinal cord

A

anterior 2/3

72
Q

Arteries that run between costals and branch off into segmental artery and dorsal/ventral radicular arteries

A

posterior intercostal artery

73
Q

Dorsal/ventral arteries go with what

A

dorsal/ventral roots

74
Q

ventral radicular arteries anastomos with what

A

ventral spinal artery

75
Q

Dorsal radicular artery anastomoses with

A

dorsal spinal artery

76
Q

Spinal cord and vertebral segmental arteries drain blood to what veins

A

anterior and posterior venous plexus

77
Q

Body of vertebra drain blood to what vein

A

basivertebral vein

78
Q

an area of skin that is innervated by sensory nerve fibers coming from a single dorsal spinal root emerging from a single spinal cord segment

A

dermatome

OTD806 (43 decks)

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