ch. 13, 14, 16 Flashcards Preview

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Flashcards in ch. 13, 14, 16 Deck (153)
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1

what are the enlargements of the spinal cord

cervical and lumbar

2

supplies nerves to shoulder and arms

cervical

3

supplies nerves to pelvis and legs

lumbar

4

what are the two longitudinal grooves of the gross anatomy of the spinal cord

posterior median sulcus
anterior median fissure

5

how many segments are part of the spinal cord

31

6

what comes out of each of these segments

each gives rise to a pair of spinal nerves

7

2 nerve roots that emerge from the spinal cord

dorsal root with sensory neurons
ventral root with motor (efferent) neurons

8

what is contained within a dorsal root ganglion

cell bodies of these neurons

9

what forms a spinal nerve

the dorsal w sensory neurons and ventral root w motor neurons

10

how does the spinal nerve get out from the vertebrae

mixed nerves both sensory and motor

11

what happens after the spinal nerve passes through the vertebrae

through intervertebral foramen and branches to form peripheral nerves

12

provide necessary physical stability
shock absorption
carry blood vessels to deliver nutrients and O2 to spinal cord

function of spinal meninges

13

location of spinal meninges

between bone and soft tissue of cord and brain

14

protective specialized membranes surrounding spinal cord and brain

spinal meninges

15

three layers of spinal meninges

dura mater
arachnoid mater
pia mater

16

outermost

dura mater

17

dense collagen fibers so it is very tough

dura mater

18

middle layer

arachnoid mater

19

epidural space- anesthetics injected into this space to block nerve function

dura mater

20

subarachnoid space- under this layer

arachnoid mater

21

filled with CSF

arachnoiod mater

22

innermost

pia mater

23

firmly bound to neural tissue underneath

pia mater

24

very thin and follows contours of spinal cord

pia mater

25

blood vessels servicing spinal cord run along surface of what kind of mater

pia mater

26

what is the subarachnoid space filled with

CSF (cerebral spinal fluid)

27

shock absorber and diffusion medium for dissolved gases, nutrients, chemical messengers and wastes

CSF

28

mostly cell bodies of neurons (interneurons), neuroglia and unmyelinated axons

gray matter in the spinal cord

29

how is the gray matter in the spinal cord structured

butterfly shaped with projections ("wings") called horns

30

with somatic and visceral sensory neurons

posterior horn