Chapter 19 The Spinal Cord And Spinal Nerves

Front 1

The spinal cord extends from the foramen magnum of the skull to the first or second lumbar vertebra where it terminates in the...

Back 1

filum terminale

Front 2

How many pairs of spinal nerves do humans have?

Back 2

31 pairs of spinal nerves

Front 3

in cross section, gray/white matter of the spinal cord looks like a butterfly or the letter H

Back 3

gray

Front 4

True or False. The cell bodies of sensory neurons are found in an enlarged area of the dorsal root called the gray commissure.

Back 4

False

Front 5

Fiber tracts conducting impulses to the brain are called the ascending or sensory/motor neurons

Back 5

sensory

Front 6

True or False. because the spinal nerves arise form fusion if the ventral and dorsal roots of the spinal cord, and contain motor and sensory fibers, all the spinal nerves are considered mixed nerves

Back 6

True

Front 7

The ventral rami of all spinal nerves except T2 through T12 form complex networks of nerves known as

Back 7

plexuses

Front 8

Severe injuries to the ___ plexus cause weakness or paralysis of the entire upper limb

Back 8

brachial

Front 9

true or false. the femoral nerve is the largest nerve from the sacral plexus

Back 9

false

Front 10

the sciatic nerve divides into the tibial and poster femoral cutaneous/common fibular nerves

Back 10

common fibular nerves

Front 11

the most superior boundary of the spinal cord

Back 11

foramen magnum

Front 12

meningeal extension beyond the spinal cord terminus

Back 12

filum terminale

Front 13

spinal cord terminus

Back 13

conus medullaris

Front 14

collection of spinal nerves traveling in the vertebral canal below the terminus of the spinal cord

Back 14

cauda equina. horse tail.

Front 15

review number 2 on page 323

Front 16

primary neuron found in the dorsal horn

Back 16

interneurons

Front 17

primary neuron found in the ventral horn

Back 17

motor neuron

Front 18

neuron in the dorsal root ganglion

Back 18

sensory

Front 19

fiber type in ventral root

Back 19

motor

Front 20

fiber type in dorsal root

Back 20

sensory

Front 21

fiber types in spinal nerves

Back 21

both sensory and motor

Front 22

where in the vertebral column is a lumber puncture generally done?

why is this the site of choice?

Back 22

L3-L5

reduces chances of damage to the spinal cord

Front 23

the spinal cord is enlarged in two regions the ___ and ____

what is the significance of these enlargements?

Back 23

cervical and lumbar regions

more nerves need more space to fit

Front 24

how does the position of the gray and white matter in the spinal cord and the cerebral hemispheres?

Back 24

spinal-white outside, gray inside

brain-white inside, gray outside

Front 25

where in the body does the varicella-zoster virus lie dormant?

Back 25

dorsal root ganglion

Front 26

do you think it's possible to get shingles more than once? why?

Back 26

yes. the virus is dormant and waits for an ideal environment.

Front 27

uncoordinated movement is damage to which tracts?

Back 27

dorsal columns (fasciculus cuneatus and fasciculus gracilis)

lateral corticospinal tract

ventral corticospinal tract

ventral spinothalamic tract

Front 28

lack of voluntary movement is damage to which tract?

Back 28

tectospinal tract

ventral spinothalamic tract

Front 29

tremors, jerky movements is damage to which tract?

Back 29

dorsal columns (fasciculus cuneatus and fasciculus gracilis_

lateral corticospinal tract

ventral corticospinal tract

ventral spinothalamic tract

Front 30

diminished pain perception is damage to which tract?

Back 30

ventral spinothalamic tract

Front 31

diminished sense of touch is damage to which tract?

Back 31

dorsal columns (fasciculus cuneatus and fasciculus gracilis)

lateral corticospinal tract

Front 32

compare and contrast the meninges of the spinal cord and the brain

Back 32

both connective tissue, protection, pia matter is bound tightly

Front 33

how can you distinguish the dorsal from the ventral horns?

Back 33

tips of the ventral horn are broader, front, fat, and thicker dorsal in the pack, pointy

Front 34

cervical nerve numbers

Back 34

c1-c8

Front 35

lumbar nerve numbers

Back 35

l1-l5

Front 36

sacral nerve numbers

Back 36

s1-s5

Front 37

thoracic nerve numbers

Back 37

t1-t12

Front 38

number 13 page 325

Front 39

loss of sensory function

Back 39

dorsal root of a spinal nerve

Front 40

loss of both motor and sensory function

Back 40

ventral ramus of a spinal nerve

Front 41

loss of motor function

Back 41

ventral root of a spinal nerve

Front 42

define nerve plexus

Back 42

intertwining of nerves

Front 43

major nerve that serves the head, neck, shoulders

Back 43

cervical nerve plexus

Front 44

major nerve that serves the diaphragm

Back 44

phrenic nerve

Front 45

major nerve that serves the posterior thigh

Back 45

posterior femoral cutaneous nerve

Front 46

major nerves that serve the leg and foot

Back 46

tibial nerve/common fibular nerve

Front 47

name 2 major nerves that serve anterior forearm muscles

Back 47

medial nerve and ulnar nerve

Front 48

major nerves that serves the abdominal wall (name plexus only)

Back 48

lumbar plexus

Front 49

name the major nerve that serves the anterior thigh

Back 49

femoral nerve

Front 50

name the major nerve that serves the medial side of the hand

Back 50

ulnar nerve