ch 13 spinal cord and spinal nerves

5.0(2)
studied byStudied by 27 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/36

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

37 Terms

1
New cards
How many pairs of spinal nerves?
31
2
New cards
what are sensory nerves called?
afferents
3
New cards
what are motor nerves called?
efferents
4
New cards
cone-shaped end of spinal cord
conus medullaris
5
New cards
thread-like extension of pia mater, stabilizes spinal cord in canal
filum terminale
6
New cards
dorsal & ventral roots of lowest spinal nerves
caudae equinae
7
New cards
area of cord from which each pair of spinal nerves arises
spinal segment
8
New cards
shaped like a letter H or a butterfly; contains neuron cell bodies, unmyelinated axons & dendrites
gray matter
9
New cards
prevents injury from over stretching because muscle contracts when it is stretched
stretch reflex (patellar reflex)
10
New cards
controls muscle tension by causing muscle relaxation that prevents tendon damage
tendon reflex
11
New cards
outermost layer/toughest
dura mater
12
New cards
pia mater below the medullary cone
terminal filium
13
New cards
innermost layer, closely over lays spinal cord, delicate collagen fibers, vascular
pia mater
14
New cards
subarachnoid space below the medullary cone
lumbar cistern
15
New cards
loose mesh of collagen and elastic fibers
subarchnoid space
16
New cards
middle layer, simple squamous epithelium/adheres to inside of dura mater
arachnoid mater
17
New cards
adipose tissue, blood vessels, loose connective tissue
spidural space
18
New cards
Gray matter is the site of synaptic connections between neurons and neuronal integration
true
19
New cards
What connects the left and right sides of gray matter?
gray commissure
20
New cards
conducts signals from peripher to CNS
dorsal root
21
New cards
conducts signals from CNS to periphery
ventral root
22
New cards
dorsal root and ventral root join to exit
vertebral foramina
23
New cards
bundle of nerves on dorsal root
dorsal root ganglion
24
New cards
supplies muscles and joints to the spine and skin of back
posterior (dorsal) ramus
25
New cards
supplies meninges and vertebrae
meningeal branch
26
New cards
how far does the spinal cord run?
foramen magnum - L1
27
New cards
The spinal cord passes through the _________
foramen magnum
28
New cards
The conus medullaris is the tapering point at the end of the spinal cord. It is located at approximately _________
L1/L2
29
New cards
The tail end of the spinal cord is not “hanging loose.” It is actually anchored via the __________, which connects to the coccyx bone
filum terminale
30
New cards
How many plexus groups branch off the spinal cord?
4
31
New cards
Which of the following spinal cord regions are NOT involved with a plexus formation
thoracic
32
New cards
The cauda equina are nerves that branch off the spinal cord in which of the following areas?
inferior end
33
New cards
What is the name of the structures that hold the spinal cord in position within the vertebral foramen?
denticulate ligaments
34
New cards
Which of the following transmits information from the spinal cord to the extremities of the body?
ventral roots
35
New cards
Fasciculi are bundles of nerve tracts associated with _________
the white matter of the spinal cord
36
New cards
Which of the following will merge together (after branching off the spinal cord) to form a spinal nerve?
ventral and dorsal roots
37
New cards
The plexus groups that are formed from the branches off the spinal cord are formed from the merging of ________
one ventral ramus with another ventral ramus