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Anatomy test 3 > Chapter 16 - Spinal Cord & Spinal Nerves > Flashcards

Chapter 16 - Spinal Cord & Spinal Nerves Flashcards

1
Q

cervical

A

8 pairs of nerves

C1 - C8

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2
Q

thoracic

A

12 pairs of nerves

T1 - T12

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3
Q

lumbar

A

5 pairs of nerves

L1 - L5

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4
Q

sacral

A

5 pairs of nerves

S1 - S5

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5
Q

coccygeal

A

1 pair of nerves

Co1

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6
Q

conus medullaris

A

tapering; end

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7
Q

cauda equina

A

axons

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8
Q

film terminalis

A

pia mater; anchors to coccyx

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9
Q

dura mater

A

superficial
epidural space-outside
subdural space-deep

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10
Q

arachnoid layer

A

subarachnoid space-CSF

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11
Q

pia mater

A

deepest

adheres to SC

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12
Q

denticulate ligaments

A

attach pia mater to arachnoid and dura mater

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13
Q

sensory neurons are found in ___ root.

A

dorsal (posterior) root

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14
Q

motor neurons are found in ___ root.

A

ventral (anterior) root

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15
Q

axons within funiculi are organized into ___.

A

tracts

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16
Q

nerve

A

bundle of axons in PNS

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17
Q

axons enter/exit SC via ___.

A

roots

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18
Q

anterior (ventral) root

A

motor; somas in anterior and lateral horns

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19
Q

posterior (dorsal) root

A

sensory; somas in dorsal root ganglion

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20
Q

anterior and posterior roots unite within ___ and form ___.

A

within intervertebral foramen and form spinal nerve

21
Q

spinal nerves are ___.

A

“mixed”

22
Q

spinal nerves branch into ___.

A

“rami”

23
Q

posterior (dorsal) rami innervate ___.

A

muscles/skin of the back

24
Q

dermatomes

A

segments of skin supplied by spinal nerve

25
Q

nerve plexuses

A

network of anterior rami of spinal nerves

26
Q

the main plexuses are?

A

cervical, brachial, lumbar, sacral

27
Q

which of the spinal nerves do not form plexuses?

A

T2-T12

28
Q

major nerve of the cervical plexus?

A

phrenic nerve

29
Q

brachial plexus is formed from which nerves?

A

C5-T1

30
Q

the 5 major nerves that go to structures of the arm

A

axillary nerve, musculocutaneous nerve, median nerve, radial nerve, ulnar nerve

31
Q

the axillary nerve innervates ___.

A

the deltoid

32
Q

the musculocutaneous nerve innervates ___.

A

the flexors of the humerus

33
Q

the median nerve innervates ___.

A

most of the wrist flexors and pronators

34
Q

the radial nerve innervates ___.

A

extensors of elbow and wrist

35
Q

the ulnar nerve innervates ___.

A

flexors of wrist (on medial side)

36
Q

the lumbar plexus is formed from ___.

A

L1-L4

37
Q

which 2 nerves are in the lumbar plexus?

A

femoral nerve, obturator nerve

38
Q

the sacral plexus is formed from ___.

A

L4-S4

39
Q

the sacral plexus contains which nerve?

A

the sciatic nerve

40
Q

tibial branch

A

muscles on back of leg

41
Q

common fibular branch

A

lower lateral/anterior leg

42
Q

5 components of reflex arc

A
  1. sensory receptor - in skin: senses stimuli
  2. sensory neuron - travels
  3. integration center - decision on what to do
  4. motor neuron - carry impulses out
  5. effector - responds to impulse from motor neuron
43
Q

polysynaptic

A

has to go through two synapses

44
Q

monosynaptic

A

goes through only one synapse

45
Q

ipsilateral

A

effect same side of body with reflex

46
Q

contralateral

A

different sides of the body are effected

47
Q

muscle spindle

A

reflex contraction in response to rapid stretch

48
Q

golgi tendon organ (GTO)

A

inhibits excessive tension

Anatomy test 3 (4 decks)

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