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A&P 2 > Spinal Nerves > Flashcards

Spinal Nerves Flashcards

1
Q

Spinal nerves carry __ ___ fibers and ___ ___ fibers

A

Sensory afferent

Motor efferent

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2
Q

At certain levels of body, spinal nerves become fused forming a complicated latter of fibers

A

Nerve plexus

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3
Q

Peripheral nerves are wrapped in

A

Connective tissue

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4
Q

Each segment has a pair of

A

Spinal nerves

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5
Q

Each nerve is surrounded by the

A

Epineurium

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6
Q

Epineurium projects into the nerve which divides up the nerve bundles of axons

A

Perineurium

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7
Q

Perineurium divides the nerve into bundles of axons

A

Fascicles

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8
Q

Each axon is surrounded by thin and delicate

A

Endoneurium

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9
Q 
Pairs of: 
Cervical
Thoracic 
Lumber 
Sacral
Coccygeal
A 
8 C
12 T
5 L
5 S
1 Co
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10
Q

Dorsal root carries

A

Sensory fibers

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11
Q

Ventral roots carry

A

Motor fibers

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12
Q

Roots in the cervical region are short, but they get progressively longer inferiorly, forming the

A

Cauda equina

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13
Q

Spinal roots join to form short

A

Spinal nerves

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14
Q

In thoracic region, ventral rami are split off another ramus carrying autonomic nerve fibers
(These enter the sympathetic trunk)

A

Rami communicantes

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15
Q

Compromised of ganglia connected to each other forming a chain

A

Sympathetic trunk

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16
Q

Clusters of sympathetic neuron cell bodies

A

Ganglia

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17
Q

Somatic motor fibers leaving neurons of the ventral horn enter the rootlets combine to form

A

Ventral roots

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18
Q

What do the motor fibers do after fusing to form the spinal nerves

A

Motor fibers enter the dorsal/ventral rami

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19
Q

Ventral rami branch fuse with another lateral to the vertebral column forming

A

Complicated nerve plexus

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20
Q

Visceral sensation comes from __ from the same regions and viscera

A

interceptors

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21
Q

Somatic sensations come from __

Body wall, back, or limbs

A

Exteroceptors

Proprioceptors

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22
Q

Somatic and visceral neurons cell bodies are located in the __ and enter the __ of spinal cord

A

Dorsal root ganglion

Dorsal horn

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23
Q

It’s the only region of body that ventral rami arrange in simple segmental pattern

A

Thorax

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24
Q

Intercostal nerves lying between ribs and muscle of thorax

Intercostal nerves wrapped in CT along with artsy and vein

A

Neurovascular bundle

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25
Q

Thoracic nerves pass to

A

Intercostal spaces, axilla, chest, muscles of thorax, deep back and ab muscles

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26
Q

Nerves emanating from regions of spinal cord that control neck upper limbs and lower limbs combine to form

A

Complex nerve plexuses

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27
Q

4 nerve plexuses

A

Cervical
Brachial
Lumbar
Sacral

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28
Q

Cervical plexus formed by

A

Ventral rami of first 4 cervical nerves

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29
Q

Only nerve innervating the diaphragm

A

Phrenic nerve

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30
Q

If both phrenic nerves are severed

A

Diaphragm is paralyzed

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31
Q

Most complicated plexus of 4
Innervates the complex musculature
Situated partly in neck and axilla
C5-T1

A

Brachial plexus

32
Q
  1. Axillary
  2. Musculocutaneous
  3. Radial
  4. Ulnar
  5. Median
A
  1. Deltoid and teres major
  2. Arm and forearm flexors
  3. Arm and forearm extensors, thumb
  4. Wrist and finger flexors, med fingers
  5. Forearm flexors except flexor carpi ulnaris
33
Q

Trauma to the radial nerve results in

A

Weakness to forearm extensors

“Wrist drop”

34
Q

Radial nerve wraps around

A

Humerus in radial groove

35
Q

Lack of blood supply to tissue

A

Ischemia

36
Q

Brachial artery being compressed leads to

A

Arm going to sleep

Saturday night paralysis

37
Q

When brachial plexus is stretched

A

Erb’s Palsy

Results from reaching out when falling, someone yanking arm or pulling from above

38
Q

Waiters tip

Results on damage of what nerves

A

Erb’s Palsy

C8-T1

39
Q

Inability to pronate arm

Inability flexing wrist

A

Median nerve Palsy

40
Q

Carpal tunnel syndrome caused by repetitive flexion pressing the nerve against

A

Flexor reticulum

41
Q

Problems adducting or abducting fingers

A

Ulnar nerve Palsy

42
Q

Little and ring fingers become hyperextended and knuckles and flexed at distal interphalangeal joints

A

Claw hand

43
Q

nerve associated with hitting funny bone

A

Ulnar nerve

44
Q

When C5-C7 is compressed

A

Winged scapula

45
Q

Trauma to the radial nerve results in

A

Weakness to forearm extensors

“Wrist drop”

46
Q

Radial nerve wraps around

A

Humerus in radial groove

47
Q

Lack of blood supply to tissue

A

Ischemia

48
Q

Brachial artery being compressed leads to

A

Arm going to sleep

Saturday night paralysis

49
Q

When brachial plexus is stretched

A

Erb’s Palsy

Results from reaching out when falling, someone yanking arm or pulling from above

50
Q

Waiters tip

Results on damage of what nerves

A

Erb’s Palsy

C8-T1

51
Q

Inability to pronate arm

Inability flexing wrist

A

Median nerve Palsy

52
Q

Carpal tunnel syndrome caused by repetitive flexion pressing the nerve against

A

Flexor reticulum

53
Q

Problems adducting or abducting fingers

A

Ulnar nerve Palsy

54
Q

Little and ring fingers become hyperextended and knuckles and flexed at distal interphalangeal joints

A

Claw hand

55
Q

nerve associated with hitting funny bone

A

Ulnar nerve

56
Q

When C5-C7 is compressed

A

Winged scapula

57
Q

Nerve that provides sensation to genitals and inner thigh

A

Ilioinguinal nerve

58
Q

Nerve that provides sensory to scrotum M and labia majora F

A

Genitofemoral nerve

59
Q

Motor nerve to adductor Magnus, gracilis, and obturator externus muscles

A

Obturator nerve

60
Q

Biggest plexus, motor nerve to the quadriceps and sartorius muscles, pectineus and iliacus
Damage to this nerve results in inability to extend leg at the knee)

A

Femoral nerve

61
Q

Nerve that innervates the prime movers of both hip flexion and knee extension

A

Femoral nerve

62
Q

Largest nerve of sacral plexus and in the body

This plexus is made up of __ and __ nerves

A

Sciatic nerve

Tibial and fibular nerve

63
Q

Nerve that innervates deep to the gluteus Maximus and enters on posterior thigh to the hip joint

A

Sciatic nerve

64
Q

Nerve that innervates posterior leg

A

Tibial nerve

65
Q

Nerve that innervates the knee joint, fibularis longus, brevis muscles, tibialis, hallucis longus and digitorum longus and brevis

A

Fibular nerve

66
Q

Nerve that motors gluteus medius and minimus to tensor fascia latae

A

Superior gluteal nerve

67
Q

Nerve that innervates gluteus Maximus

A

Inferior gluteal nerve

68
Q

Pain extending from buttocks down to back of leg means damage or pinching to

A

Sciatic nerve

69
Q

Condition of intense stabbing pain radiating over the course of sciatic nerve from gluteal region to toes

A

Sciatica

70
Q

Injury to fibular nerve nerve

Unable to dorsiflex while walking because they will stumble/fall

A

Foot drop

71
Q

Calf muscles can’t plantar flex the foot

A

Shuffling gait

Damage to tibial nerve

72
Q

Injuries to sciatic can be from

A

Herniated disc
Uterus pressure during pregnancy
Osteoarthritis

73
Q

Area of skin innervated by a single pair of spinal nerves

A

Dermatome

74
Q

All spinal nerves innervated dermatomes except

A

C1

75
Q

Damage or infection of spinal nerve or dorsal root ganglion results in

A

Loss of sensation to region of skin supplied by the nerve

A&P 2 (14 decks)

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