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OTD806 > Unit I Lec 9 > Flashcards

Unit I Lec 9 Flashcards

(78 cards)

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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
Approx length of spinal cord in adults
58-60cm (23-24 in)
26
Spinal cord ends where in a baby
L3-L4
27
Term for "stuck" spinal cord in which spinal cord is lenghened
tethered cord
28
Feature at end of spinal cord where dorsal and ventral roots are elongated
cauda equina
29
Termination of spinal cord (shaped like a cone)
conus medullaris
30
Where does the dural sac end in the spinal cord
around S1, S2
31
Sac that contains CSF and holds cauda equina
dural sac
32
Location of cervical enlargement
C5-T1
33
Why is there a cervical enlargement C5-T1)
location of brachial plexus, neurons for hands and arms
34
Why is there a lumbar enlargement (L1-S4)
location of lumbosacral plexus, innervation of lower limbs
35
String of pia mater that runs from conus medullaris to coccyx, holds spinal cord in place
filum terminale
36
Term for tissue layer directly on the surface of spinal cord and dorsal/ventral roots
pia mater
37
Superficial to the pia mater, what is the filmy layer of tissue
arachnoid mater
38
Most superficial most durable layer of tissue, on spinal cord and also extends to roots
dura mater
39
Number of pairs of denticulate ligaments on spinal cord
21
40
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
denticulate ligaments
41
Fluid in the subarachnoid space
cerebrospinal fluid (CSF)
42
Space between dura mater and arachnoid space
potential space, layers typically stick together
43
space above dura mater that contains fat and anterior and posteruir venous plexi to return blood to heart
epidural space
44
Vein that drains blood in vertebral venus plexus to CVS
basivertebral vein
45
Path of prostate cancer to invade spine
vertebral venus plexus
46
Network of veins that drains epidural space
vertebral venus plexus
47
White matter contains what portion of neuron
axons
48
Grey matter contains what portion of neuron
cell bodies
49
Three white columns in spinal cord
Dorsal, leteral, ventral white columns
50
Another name for white column
Funniculus
51
Three horns in spinal cord
Posterior, lateral, and anterior gray horns
52
Dorsal gray column does what
sensory
53
Lateral, ventral gray column does what
motor
54
Term for gray matter that connects the horns
gray commissure
55
Term for small hole in the gray commissure
central canal
56
Central canal is left over from
fetal development of spinal cord
57
Anterior white column is split by what on the anterior side of spinal cord
anterior median fissure
58
Posterior white column is split by what
posterior median sulcus
59
2 Vertebral arteries originate from what
subclavian arteries
60
2 Vertebral arteries go where
posterior circulation of brain
61
2 dorsal spinal arteries go where
along sides of spinal cord
62
cauda equina arteries come from
2 dorsal spinal ateries
63
lateral sacral arteries go where
circle around sacrum
64
"feeder" arteries that keep arterial blood flowing down entire spinal cord
segmental arteries
65
Dorsal spinal arteries supply blood to what portion of spinal cord
dorsal 1/3 of spinal cord approx
66
On ventral side, how many ventral spinal arteries
1
67
Ventral spinal artery travels where
ventral median sulcus
68
Cauda equina arteries anastomos with what other arties to keep circulation
lateral sacral arteries
69
Major feeder artery of spinal artery that originated almost always on left side, arises between T8-L1
Anterior medullary artery of adamkiewicz
70
Damage to anterior medullary artery of adamkiewicz can cause what
paraplegia
71
Ventral spinal artery supplies what portion of spinal cord
anterior 2/3
72
Arteries that run between costals and branch off into segmental artery and dorsal/ventral radicular arteries
posterior intercostal artery
73
Dorsal/ventral arteries go with what
dorsal/ventral roots
74
ventral radicular arteries anastomos with what
ventral spinal artery
75
Dorsal radicular artery anastomoses with
dorsal spinal artery
76
Spinal cord and vertebral segmental arteries drain blood to what veins
anterior and posterior venous plexus
77
Body of vertebra drain blood to what vein
basivertebral vein
78
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
dermatome

OTD806 (43 decks)

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