Spinal Nerves Flashcards

1
Q

• The first cervical nerve passes through the .., .

A

lateral vertebral foramen of the atlas

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2
Q

The number of spinal nerve pairs in each section of the vertebral column corresponds
to the number of vertebrae True/False

A

False(the exception of the cervical spine and the tail.)

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3
Q

There are eight cervical spinal nerves for seven cervical vertebrae.
True/False

A

True

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4
Q

• In the coccygeal region, there are fewer nerves than vertebrae.
True/ False

A

True

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5
Q

• Each spinal nerve originates from the spinal cord with a…….and …….

A

Dorsal and ventral branch.

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6
Q

The two roots unite within the vertebral canal to form the………

A

the spinal nerve

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7
Q

Close to the union of the two roots the dorsal root carries the spindle-shaped spinal
ganglion that consists of the cell bodies of

A

afferent, pseudounipolar neurons.

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8
Q

The dorsal root is composed …… fibres, while the ventral root is composed of

A

afferent, efferent motor and autonomous fibres.

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9
Q

The mixed spinal nerve exits through the intervertebral foramen and
divides almost immediately into branche

A

dorsal and ventral

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10
Q

The dorsal branch

of the spinal nerve further divides into a

A
medial branch (for the innervation of the muscles
of the back) and a lateral branch (for the skin of the back
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11
Q

Cutaneous segments which are innervated by a particular spinal nerve are designated

A

Dermatomes

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12
Q

Dermatomes supply the

A

Skin

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13
Q

The larger ventral branch of the spinal nerve innervates what muscles

A

Muscles ventral to the transverse processes and the remains skin, including the limbs.

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14
Q

The ventral branches of the spinal nerves divides into two primary branches which arise in the …….&……….,

A

Middle of the abdomen and the second close to the linear alba.

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15
Q

Brachial plexus comprise of

A

Ventral branches of the last three cervical nerves, and the first two thoracic nerves.

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16
Q

The brachial plexus gives rise to the …..

A

Nerves of the forelimb

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17
Q

The last three lumbar nerves and the first two sacral nerves form the …….

A

Lumbosacral plexus of the hind limb

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18
Q

The dorsal and ventral cervical nerve communicates with each other to form

A

the dorsal and ventral cervical plexus.

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19
Q

The ventral branch of the first cervical nerve joins the hypo glossal nerve to form branches that innervate the….

A

Long muscles of the hyoid apparatus; the sternohyoid, the sternothyroid and the omohyoid muscle

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20
Q

The ventral branch of the second cervical nerve detaches the

A

great auricular nerve (which innervates the caudal par of the ear after joining the caudal auricular branch of the facial nervd)

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21
Q

The ventral roots of the fifth (cat:fourth) to seventh cervical nerves form the

A

Phrenic nerve.

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22
Q

The phrenic nerve runs caudal ly within the mediastinium to innervate the ………….

A

Diaphragm

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23
Q

The supra clavicular branches also arise from a)……. and innervates the ……..

A

a) ventral branches of the cervical nerve and innervates the skin over the shoulder joint

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24
Q

What are the branches of the Brachial Plexus

A

Long Thoracic Nerve.

  • Thoracodorsal nerve
  • Lateral thoracic nerve
  • Cranial and caudal pectoral nerve
  • Subscapular nerves.
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25
Q

Where is the long thoracic nerve located.

A

It passes caudally on the lateral surface of the thoracic part of the ventral serrate muscle.

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26
Q

The location of the thoracodorsal nerve is?

A

Arises from the last cervical spinal nerve to innervate the broadest muscle of the back

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27
Q

Give the direction and innervation of The lateral thoracic nerve

A

Arisres from the Caudal part of plexus and innervates the abdominal cutaneous muscle,,,_and the skin caudal to the triceps

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28
Q

The cranial and caudal pectoral nerve innervates…

A

The superficial pectoral muscle and the deep pectoral muscles.

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29
Q

The subscapular nerve innervates

A

Cranial and middle part of the subscapular muscle.

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30
Q

What are the branches of the brachial plexus with relatively limited distribution

A

Suprascapular nervr, muscle I cutaneous nerve and the axillary nerve.

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31
Q

What nerve (branch) of the brachial plexus run parallel to the median nerve?

A

Musculocutaneous nerve

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32
Q

The musculocutaneous branch joins the median branch in ungulates to form a loop around the …………. artery

A

Axillary artery.

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33
Q

The musculocutaneous nerve innervates which muscles?

A

Coracobrachial muscle and the biceps muscle.

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34
Q

………….nerve divides to form the median nerve that supplies the brachial muscles and the skin on the medial antebrachium.

A

Musclelocutaneous branch.

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35
Q

True or false lesions of the muscle I cutaneous nerve can be compensated for by the radial nerve.

A

True.

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36
Q

Lessions f the musculo cutaneous nerve would cause?

A

Paralysis of the main flexors of the elbow

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37
Q

…………….. can be an indicator of musculocutaneous nerve damage.

A

Loss of sensation if the skin on the medial aspect of the antebrachium

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38
Q

The suprascapular nerve innervates the ……….

A

Supraspinous and the infraspinous muscles

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39
Q

True or false the suprascapular nerve is vulnerable to traumatic damage?

A

True. Because of it’s close relationship to the scapula

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40
Q

Paralysis of the suprascapular nerve causes ……..

A

Atrophy of the suprascapular and infrascapular muscles.

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41
Q

In the standing animal, when the shoulder is abducted and there is “shoulder slip” what nerve could be affected?

A

Suprascapular nerve. This condition is clinically known as “Sweeney” in horses. ( caused by trauma when the nerve stretches against the scapula by over abduction.

42
Q

The axillary nerve innervates the ………..

A

Teres major muscle and the caudal 3rd of the subscapular muscle. Also innervates the capsular and teres minor muscle.

43
Q

The branches of the axillary nerve innervates the……….

A

the deltoid muscle and gives off a branch to the cleidobrachial muscle

44
Q

Aspects of the brachial plexus that extend all the way to the apex of the thoracic limb includes?

A

Radial nerve.
Median Nerve.
Ulnar nerve.

45
Q

What nerve received most of it’s fibres from the eight cervical nerve

A

Radial nerve

46
Q

The largest nnerve if the brachial plexus with the widest distribution is the ……..

A

Radial nerve

47
Q

The radial nerve innervates?

A

All extensors muscles of the thoracic limb except those of the shoulder joint.
Also the skin on the lateral aspect of the limb.

48
Q

The radial nerve runs from the antebrachium to the apex of the fore limb in all domestic animals. True or false.

A

False. Except in horses.

49
Q

Caudally the radial nerve innervates the

A

Extensors of thethoracic limb and elbow joint.( triceps brachi, anconeus and tensor of the antebranchial fascia)

50
Q

True/ false?

The more proximal the damage, the more severe the syndrome and the more grave the prognosis.

A

True

51
Q

The median nerve originates from the brachial plexus and runs down the medial surface of the antebrachium.
True or false?

A

True

52
Q

The medial nerve combineswith what nerve to form a loop around the axillary artery?

A

Musculocutaneous nerve

53
Q

The median nerve innervates the …….

A

Large caudal group of flexor muscles of the antebrachium.( also radial flexor, deep and superficial digital flexor muscles)

54
Q

The median nerve passes through the ……..in cats

A

Supracondylar foramen

55
Q

True/False.The ulna nerve runs distally on the lateral aspect of the antebrachium with the median nerve.

A

Falsr.The ulna nerve runs distally on the medial aspect of the antebrachium with the median nerve.

56
Q

True or false the dorasl branch of the ulnar nerve innervates the skin of the lateral surface of the distal limb.

A

TrueTrue or false the dorasl branch of the ulnar nerve

passes dorsally to innervates the skin of the lateral surface of the distal limb.

57
Q

True or false the ulnar nerve innervates the radial flexor muscles and the deep and superficial digital flexor muscles

A

False.ulnar nerve innervates the ulnar flexor muscles and the deep and superficial digital flexor muscles

58
Q

The continuation of what nerve passes through the carpal carnal to innervate muscles skin and deeper structures if the digits

A

Ulnar nerve

59
Q

The musculocutaneous nerve has …… and …. Branches then finally gives off the ………nerve

A

a)proximal muscular branch and distal muscular branch then gives off the median nerve

60
Q

…… Detaches the caudal cutaneous antibrachial nerve

A

Ulnar nerve

61
Q

……nerve gives off the cranial cutaneous anti brachial nerve.

A

Radial nerve

62
Q

What are the branches of the radial nerve.

A

a( branch that supplies the triceps muscle.

b) branch that supplies the extensors of the forelimb, c) cranial cutaneous anti brachial nerve.

63
Q

The dermatomes of the more caudal spinal nerves extend…………while the extent of the cranial ones are restricted to the ……….parts of the body wall.

A

a) ventrally,

b) dorsal parts of the body wall.

64
Q

There atlre ./….&….. Lumbar nerves in dogs and horses respectively.

A

Seven(7) &Six( 6)

65
Q

The nerves that inner vate the rump are terned…..

A

Cranial clunial nerves

66
Q

The ventral lumbar branches interconnect to form the …..

A

Lumbar plexus.

67
Q

The ventral branches of the lumbar vertebrae, except those of the first three form the ……….

A

Lumbar plexus proper

68
Q

The lumbar plexus proper unites with the first and second sacral nerve to form the ……….

A

Lumbo sacral plexus.

69
Q

The most important nerves of the hind limbs includes?

A

Femoral nerve, obtural nerve, fibular nerve, Tibial nerve.

70
Q

The lumbar spinal nerves are of considerable importance because?

A

They are often anaesthetized for abdominal & pelvic surgery.

71
Q

Nerves arising from the lumbar plexus includes;

A
A)Iliohypogastric nerve.
B)Ilioinguinal nerve.
C)Genitofemoral nerve.
d)Lateral Cutaneous Femoral Nerve.
E)Femoral nerve
F)Obturator nerve.
72
Q

The fibula nerve is also known as the …….

A

Peroneal nerve.

73
Q

The fibula nerve is also known as the …….

A

Peroneal nerve.

74
Q

-In the cat and the dog, in which there are seven lumbar vertebrae, the first two ventral branches are known as the …….

A

cranial and caudal iliohypogastric nerves

75
Q

The iliohypogastric nerve is divided into

A

Lateral and medial branches.

76
Q

The lateral branch of iliohypogastric nerve muscle innervates……

A

Abdominal muscles and detaches a lateral cutaneous branch and a medial cutaneous branch.

77
Q

True/ false The lateral cutaneous branch that innervates the thin skin band caudal to the ribs.

A

True

78
Q

The media cutaneous branch

of the hyppgastric nerve innervates the ……. innervates?

A

Ventral abdominal skin,inguinal mammary glands, medial side of the thigh where it it combines with the ilioinguinal nerve

79
Q

The ilioinguinal nerve is the ………lumbar spinal nerve

A

Primary ventral branch of the second lumbar spinal nerve.. It innervates muscles caudal to that of the iliohypogastric nerve.

80
Q

Genitofemoral nerve Innervates the

A

Internal oblique muscle, skin overmedial aspect of the thigh,Inguinal .mammary glands(skin & vulva in dogs&cats)
, prepuce and scrotum.

81
Q

Lateral cutaneous femoral nerve is formed by the

A

Fourth lumbar nerve and innervates the skin over the lateral aspect of the distal thigh and the stifle joint.

82
Q

The strong nerve which detaches branches to the inner lumbar muscles in it’s proximal portion and innervates all four head of the quadriceps is the………

A

Femoral nerve.

83
Q

It continues caudally along the iliopdoas and greater psoas muscles and branches to form the saphenous nerve. What nerve is it?

A

Femoral nerve.

84
Q

The femoral nerve is prone to damage at……..

A

Adjacent to the pecten of pubis where it passes

85
Q

The most common cause of femoral nerve injury is?

A

Over extension of the quadriceps. (The damage to the femoral nerve leads to paralysis of the femoral nerve.

86
Q

The saphenous nerve innervates the……….

A

Sartorius,pectineal and gracilis muscles.

87
Q

Apart from themuscles.The saphenous nerve innervates the …….

A

The skin over the medial aspect of the leg, extending from the thigh to the tarsus.

88
Q

…… Nerve follows the medial aspect of the shaft of the ilium to reach the obturator foramen, through which it leaves the pelvis.

A

Obturator nerve.

89
Q

The obturator nerve innervates?

A

The adductor muscles(pectineal, gracilis and external obturator muscles)

90
Q

Pelvic fractures and compression during calving and foaling are common causes of injury to what nerve?

A

Obturatlr nerve

91
Q

The sacral nerves leave the sacral element s of the spinal cord by means of ……..

A

Long dorsal and ventral roots.

92
Q

The sacral

nerve roots merge to form the ……….within the sacral canal prior to passing to the …………

A

The sacral
nerve roots merge to form the spinal cranial nerve within the sacral canal prior to passing to the inter vertebra foramen.

93
Q

The dorsal branches of the sacral nerve are inter connected to form ……..

A

Small dorsal plexus.

94
Q

The dorsal branches of the sacral nerves divide to form……….

A

Lateral branches( which gives off the dorsal cutaneous branches and the medial muscular branches.

95
Q

The ventral branches of the sacral nerves form the

A

sacral plexus

96
Q

The ventral branches of the cranial sacral nerve( sacral plexus) joins the vertebra branches of the last three lumbar spinal nerves to form the

A

Lumbsacral plexus

97
Q

The sacral part of the lumbo sacral plexus extends distally in the wall of the pelvic cavity as the

A

Sciatic plexus and continues as the sciatic nerves.

98
Q

Sciatic plexus gives origin to which nerves

A

Cranial gluteal nerve, caudal gluteal nerve, caudal femoral cutaneous nerve
Pudendal nerve
Caudal Rectal nerves.

99
Q

Cranial gluteal nerve innervates the

A

Middle and deep gluteal muscles,tensor fasciae late and the piriform muscles

100
Q

Cranial gluteal nerve
Leaves the pelvis by passing immediatey over the….

…. a companied by the the cranial gluteal blood vesels

A

Greater Isciatic notch

Cranial gluteal blood vessels