Nervous Lab Ii

Front 1

information highway between brain and body

Back 1

spinal cord

Front 2

spinal cord extends through vertebral canal from _________ to __________

Back 2

foramen magnum
L1

Front 3

each pair of these receives sensory info and issues motor signals to muscles and glands

Back 3

spinal nerves

Front 4

component of CNS

Back 4

spinal cord

Front 5

part of PNS

Back 5

spinal nerves

Front 6

cylinder of nerve tissue w/in vertebral canal

Back 6

spinal cord

Front 7

central area of gray matter shaped like

Back 7

butterfly

Front 8

gray matter

Back 8

neuron cell bodies w/ little myelin

Front 9

white matter

Back 9

myelinated axons

Front 10

# of cervical spinal nerves

Back 10

8 pairs

Front 11

# of thoracic spinal nerves

Back 11

12 pairs

Front 12

# of lumbar spinal nerves

Back 12

5 pairs

Front 13

# of coccygeal spinal nerves

Back 13

1 pair

Front 14

each spinal nerve has what two divisions?

Back 14

dorsal and ventral ramus

Front 15

cervical nerve plexus located in

Back 15

neck, C1-5

Front 16

brachial nerve plexus located in

Back 16

armpit, C5-T1

Front 17

lumbar nerve plexus located in

Back 17

low back, L1-4

Front 18

sacral nerve plexus located in

Back 18

pelvis, L4, L5, & S1-4

Front 19

coccygeal nerve plexus located

Back 19

S4, S5, C0

Front 20

supplies neck and phrenic nerve to diaphragm

Back 20

cervical plexus

Front 21

supplies upper limb and some of shoulder and neck

Back 21

brachial plexus

Front 22

supplies abdominal wall, anterior thigh and genitalia

Back 22

lumbar plexus

Front 23

supplies remainder of butt and lower limb

Back 23

sacral nerve plexus

Front 24

CN I

Back 24

olfactory

Front 25

CN II

Back 25

optic

Front 26

CN III

Back 26

oculomotor

Front 27

CN IV

Back 27

trochlear

Front 28

CN V

Back 28

trigeminal

Front 29

CN VI

Back 29

abducens

Front 30

CN VII

Back 30

facial

Front 31

CN VIII

Back 31

auditory

Front 32

CN IX

Back 32

glossopharyngeal

Front 33

CN X

Back 33

vagus

Front 34

CN XI

Back 34

accessory

Front 35

CN XII

Back 35

hypoglossal

Front 36

conduct signals from receptors to CNS

Back 36

sensory (afferent) neurons

Front 37

conduct signals from CNS to effectors such as muscles and glands

Back 37

motor (efferent) neurons

Front 38

are confined to CNS

Back 38

interneurons (association neurons)

Front 39

quick, involuntary, stereotyped reactions of glands or muscle to sensory stimulation

Back 39

somatic reflexes

Front 40

carry signal to dorsal horn of spinal cord

Back 40

afferent fibers

Front 41

integrate info

Back 41

interneurons

Front 42

carry impulses to skeletal muscles

Back 42

efferent fibers

Front 43

conus medullaris

Back 43

tapered, lower end of spinal cord

Front 44

terminal filum

Back 44

tension stabilizes entire spinal cord

Front 45

cauda equina

Back 45

parallel nerves resemble horse's tail

Front 46

cervical enlargement

Back 46

A bulge in the spinal cord that has increased
innervation of the upper extremities.

Front 47

lumbar enlargement

Back 47

A bulge in the spinal cord that has increased
innervation of the lower extremities.

Front 48

anterior gray horns

Back 48

Send motor signals to the spinal nerves.
Where the motor nerve cell bodies are
located.

Front 49

posterior gray horns

Back 49

Receive sensory information from the somatic
nerves.

Front 50

lateral gray horns

Back 50

Only present in some part of the spinal cord.

Front 51

Gray commissure

Back 51

Gray matter on each side is connected by
this crossbar.

Front 52

central canal

Back 52

in the middle of the gray
commissure and runs the length of the spinal
cord.

Front 53

posterior median sulcus

Back 53

A depression in the posterior surface of the
spinal cord

Front 54

anterior median sulcus

Back 54

A deeper depression on the anterior side of
the spinal cord.

Front 55

posterior ramus

Back 55

A branch of sensory and motor nerve fibers.

Front 56

anterior ramus

Back 56

A branch of sensory and motor nerve fibers.

Front 57

spinal nerve

Back 57

The united posterior and anterior rami

Front 58

intervertebral foramen

Back 58

where spinal nerves enter

Front 59

posterior (dorsal) root

Back 59

It carries sensory information to the posterior
gray horn of the spinal cord.

Front 60

anterior (ventral) root

Back 60

The nerve cell bodies of the motor nerves are
located in the anterior gray horn, they send
motor signals which exit the spinal cord via
the anterior root.

Front 61

nerve

Back 61

Nerve fibers (axons) are clustered in parallel
arrangements called nerves in the PNS.

Front 62

tract

Back 62

Nerve fibers (axons) are clustered in parallel
arrangements called tracts in the CNS.

Front 63

endoneurium

Back 63

The sheath that wraps around single nerve
fibers and their myelin sheaths.

Front 64

perineum

Back 64

The sheath that wraps around groups of
nerve fibers (nerve fasicle).

Front 65

epineurium

Back 65

The wrapping that covers the entire nerve.

Front 66

phrenic nerve

Back 66

This nerve runs to the diaphragm and is
responsible for its contraction in breathing

Front 67

major nerves of brachial plexus

Back 67

Radial, median, ulnar,
musculocutaneous, axillary

Front 68

major nerves of cervical plexus

Back 68

phrenic

Front 69

median nerve

Back 69

runs the length of each upper extremity and
serves the hand and forearm flexors

Front 70

musculocutaneous nerve

Back 70

innervates many muscles of the arm

Front 71

ulnar nerve

Back 71

This nerve
crosses behind the medial epicondyle of the
humerus and is commonly known as the
‘funny bone’

Front 72

axillary nerve

Back 72

innervates upper shoulder

Front 73

radial nerve

Back 73

innervates triceps brachii

Front 74

major nerves of lumbar plexus

Back 74

femoral and obturator

Front 75

femoral nerve

Back 75

A large nerve that passes posteriorly to the
inguinal pigment and mostly innervates the
muscles of the anterior thigh.

Front 76

obturator nerve

Back 76

innervates adductors of thigh

Front 77

major nerves of sacral plexus

Back 77

sciatic (tibial and
common fibular)

Front 78

sciatic nerve

Back 78

The tibial and common fibular nerve unite to
form the sciatic nerve, a large nerve of the
posterior thigh, which innervates the leg and
foot.

Front 79

thoracic nerves

Back 79

Numerous nerves not associated with a
plexus.

Front 80

what type of signal travels through anterior gray horn?

Back 80

motor

Front 81

what type of signal travels through posterior gray horn?

Back 81

sensory

Front 82

what major nerve(s) arise from cervical plexus?

Back 82

phrenic

Front 83

what major nerve(s) arise from brachial plexus?

Back 83

radial, median, ulnar, musculocutaneous, axillary

Front 84

what major nerve(s) arise from lumbar plexus?

Back 84

femoral, obturator

Front 85

what major nerve(s) arise from sacral plexus?

Back 85

sciatic (tibial and common fibular)

Front 86

how does the function of posterior spinal root differ from anterior spinal root?

Back 86

posterior: carries sensory signals to posterior gray horn
anterior: sends motor signals

Front 87

where is terminal filum found?

Back 87

made up of pia mater that projects directly downward forming slender filament

Front 88

what is conus medullaris?

Back 88

latin for medullary cone; tapered, lower end of spinal cord

Front 89

what is cauda equina?

Back 89

bundle of spinal nerves and spinal nerve roots (L2-L5, S1-S5, C0)

Front 90

what is endoneurium?

Back 90

sheath that wraps around single nerve fibers and their myelin sheath

Front 91

how do tracts differ from nerves?

Back 91

tracts = axons clustered in CNS
nerves = axons clustered in PNS

Front 92

diaphragm contractions regulated by what nerve?

Back 92

phrenic

Front 93

what is innervation of biceps brachii?

Back 93

musculocutaneous nerve

Front 94

extensor muscles of hand controlled by what nerve?

Back 94

radial nerve

Front 95

sciatic nerve is composed of what two nerves?

Back 95

tibial and common fibular nerve

Front 96

person has feeling from deltoid and biceps brachii region but no feeling from hand extensors. where on spinal cord has injury occurred?

Back 96

brachi plexus (C5-T1)

Front 97

3 cranial nerves concerned w/ movement of eye

Back 97

oculomotor, trochlear, abducens