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CVM710: Anatomy (Shelby) > exam 2: Nervous system lumbosacral plexus > Flashcards

exam 2: Nervous system lumbosacral plexus Flashcards

1
Q

As the clinical signs of spinal cord disease are characteristic for each of these regions, animals are considered to have a _________________

A

region-specific localization

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2
Q

section of spine that consist of C1–5 (neck) is referred to as

A

cervical

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3
Q

section of spine that consist of C6–T2: thoracic limbs is referred to as

A

Cervical intumescence

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4
Q

section of spine that consist of T3–L3: trunk is referred to as

A

Thoracolumbar

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5
Q

section of spine that consist of L4–S3: pelvic limbs and pelvic viscera is referred to as

A

Lumbosacral intumescence

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6
Q

section of spine that consist of Cd1–5: tail is referred to as

A

Caudal segments

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7
Q

Thoracic spinal nerves
(T3–T12 segments): Dorsal branches

motor, sensory or both

A

both

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8
Q

Thoracic spinal nerves
(T3–T12 segments):
what is the motor portion of the dorsal branch? what muscles does it go to?

A

medial branch

motor for epaxial
sensory for dorsum

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9
Q

Thoracic spinal nerves
(T3–T12 segments):
the dorsal branch splits into the medial branch and ________ branch

A

lateral branch (cutaneous sensory)

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10
Q

Thoracic spinal nerves: Ventral branch also known as ____________

A

intercostal nerve

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11
Q

Thoracic spinal nerves
(T3–T12 segments):
Ventral branches = intercostal nerves

these are thoracic spinal nerves 1- ___

A

12

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12
Q

Thoracic spinal nerves
(T3–T12 segments):
ventral branches-motor portion goes to which muscle

A

both
motor= external & internal
intercostal mm., transversus thoracis m., and rectus abdominis m

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13
Q

ventral branches-sensory split into what 2 branches

A

Lateral cutaneous and Ventral cutaneous branch

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14
Q

what is A pointing to? B?

A

A: Lateral Cutaneous br. from dorsal brs. of thoracic spinal nerves

B: Lateral Cutaneous br. from ventral brs. of thoracic spinal nerves (intercostal nn.)

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15
Q

Lateral Cutaneous brs.
of IC nn. T2,T3 is commonly called

A

Intercostobrachial nn.

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16
Q

for the Intercostobrachial nn. where should you check for a reaction

A

tricipital area; not the muscle because the muscle is innervated by the radial nerve

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17
Q

what branch/nerve innervate tricipital and part of axillary regions of thoracic a limb

A

Lateral Cutaneous brs.
of IC nn. T2,T3. (Intercostobrachial nn.)

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18
Q

name the nerves starting with 1 and moving dorsally

A

IC n 9.
IC n 10
IC n 11
IC n 12

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19
Q

what is being pointed to

A

IC n 9

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20
Q

what nerve is located at T13?
is it sensory, motor or both

A

Costoabdominal n
BOTH

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21
Q

what nerve is associated with L1

sensory, motor, both

A

Cranial iliohypogastric n.

BOTH

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22
Q

what nerve is associated with L2

motor, sensory, both

A

Caudal iliohypogastric n

BOTH

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23
Q

what are the nerves that supply to the abdominal wall (3)

A

Costoabdominal n

Cranial iliohypogastric n.

Caudal iliohypogastric n

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24
Q

what nerve is associated with L4

motor, sensory, both

A

Lateral cutaneous femoral n. (L4)

sensory only

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25
Q

this is the autonomous zone for what nerve

A

Lateral cutaneous femoral n. (L4)

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26
Q

what nerve is formed by ventral branches of L3 and
L4 spinal nerves

A

Genitofemoral nerve

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27
Q

is the Genitofemoral nerve motor, sensory or both

A

motor and sensory

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28
Q

what is the Genitofemoral nerve motor to

A

Motor to cremaster m (ONLY IN MALES)

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29
Q

what is the Genitofemoral nerve sensory to

A

inguinal region
(inguinal mammary gland, prepuce), proximal medial thigh

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30
Q

what nerve is being pointed to

A

gentiofemoral nerve

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31
Q

what nerve is this the autonomous zone for in males

A

Genitofemoral nerve

(prepuce and penis)

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32
Q

what nerve is this the autonomous zone for in females

A

Genitofemoral nerve

(femoral triangle, caudal mammary glands)

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33
Q

what nerve arises from L4, L5, L6 spinal nerves

A

Obturator n.

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34
Q

what nerve Innervates adductors of pelvic limb:
– External obturator m.
– Pectineus m.
– Gracilis m.
– Adductors

A

Obturator nerve

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35
Q

the obturator nerve innervates what muscles

A

adductors of pelvic limb:
– External obturator m.
– Pectineus m.
– Gracilis m.
– Adductors

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36
Q

is there an autonomous zone for the obturator nerve

A

NO!! (only motor)

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37
Q

what structure does the obturator nerve cross over

A

obturator foramen

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38
Q

what nerve arises from technically L4, L5, L6 spinal nerves; MAINLY L5

A

Femoral nerve

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39
Q

what nerve is being pointed to

A

obturator nerve

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40
Q

what nerve is being pointed to by the red arrow

A

femoral nerve

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41
Q

what nerve emerges from the iliopsoas m

A

Femoral nerve

42
Q

Is the Femoral nerve motor, sensory or both

A

sensory and motor

43
Q

what does the motor portion of the femoral nerve go to

A

Innervates:
– Iliopsoas m.
– Quadriceps femoris m.
– Sartorius m

44
Q

what nerve innervates
– Iliopsoas m.
– Quadriceps femoris m.
– Sartorius m

A

femoral nerve

45
Q

what nerve does the femoral nerve give rise to

A

saphenous n

46
Q

this nerve give cutaneous innervation to skin of medial femoral, genual, tibial and
pes regions

A

saphenous n

47
Q

what does the saphenous n give skin innervation to

A

medial femoral, genual, tibial and pes regions

48
Q

what nerve is the blue arrow pointing to

A

saphenous n.

49
Q

what nerve is this

A

saphenous n.

50
Q

the red is representing the autonomous zone for which nerve

A

femoral (distal to femoral triangle)

51
Q

Caudal cutaneous femoral n. is from which 3 vertebrae

A

S1, S2, S3

52
Q

what nerve:

  • Follows caudal gluteal a. to level of ischiatic tuberosity
  • Terminates in skin on proximal caudal half of thigh
A

Caudal cutaneous femoral n.

53
Q

what nerve is this zone for

A

Caudal cutaneous femoral n.

54
Q

Formed by ventral branches
of L6,L7, S1, S2

Near greater ischiatic notch

A

Lumbosacral trunk

55
Q

what does the Lumbosacral trunk give rise to

A

– Caudal gluteal n.
– Cranial gluteal n.
– Sciatic n

56
Q

what gives rise to:
– Caudal gluteal n.
– Cranial gluteal n.
– Sciatic n

A

Lumbosacral trunk

57
Q

is the Lumbosacral trunk motor, sensory or both

A

both

58
Q

what nerve innervates the Superficial gluteal m.

A

Caudal gluteal n. (motor only)

59
Q

what nerve innervates:
Middle gluteal m.
Piriformis m.
Deep gluteal m.
Tensor fasciae latae m

A

Cranial gluteal n. (motor only)

60
Q

what muscles does the Caudal gluteal n. innervate

A

Superficial gluteal m.

61
Q

what muscle(s) does the Cranial gluteal n. innervate

A

Middle gluteal m.
Piriformis m.
Deep gluteal m.
Tensor fasciae latae m.

62
Q

label 1-3

A
  1. Sacrotuberal lig.
  2. Caudal gluteal vessels
  3. Sciatic n.
63
Q

label 1 and 2

A

1.Caudal gluteal n.
2.Cranial gluteal n

64
Q

is the sciatic nerve motor, sensory or both

A

motor and sensory

65
Q

what nerve:
Arises from L6, L7, S1, S2 spinal nerves

  • Courses over greater ischiatic notch, dorsal and caudal to the coxal joint.
A

Sciatic nerve

66
Q

within the pelvis, what does the sciatic n innervate

A

– Internal obturator m.
– Gemelli mm.
– Quadratus femoris m

67
Q

what nerve innervates
– Internal obturator m.
– Gemelli mm.
– Quadratus femoris m

A

sciatic

68
Q

Caudal to hip, the sciatic nerve innervates what muscles

A

– Biceps femoris m.
– Semimembranosus m.
– Semitendinosus m

69
Q

what nerve innervates:
– Biceps femoris m.
– Semimembranosus m.
– Semitendinosus m

A

sciatic

70
Q

what nerves arise from fibular and tibial components of sciatic
n. to supply cutaneous innervation to lateral
and caudal surfaces of crus

A

Lateral and caudal cutaneous sural nn

71
Q

Autonomous zones of
which nerve

A

cutaneous sural nn.

72
Q

Proximal to the stifle, the sciatic nerve divides into

A

Common fibular (peroneal) n.

Tibial n

73
Q

what nerve innervates flexors of the tarsal
joint and extensors of the digit

A

Common fibular (peroneal) n.

74
Q

what nerve innervates extensors of the tarsal
joint and flexors of the digit

A

Tibial n

75
Q

what does the Common fibular (peroneal) n. innervate

A

flexors of the tarsal
joint and extensors of the digit

76
Q

what does the Tibial n innervate

A

extensors of the tarsal
joint and flexors of the digit

77
Q

are the two branches of the sciatic( Common fibular (peroneal) n. and tibial n.)

sensory, motor, or both

A

sensory and motor

78
Q

label 1-3

A
  1. sciatic n
  2. common fibular
  3. tibial
79
Q

what nerve is this

A

sciatic nerve

80
Q

identify

A

Motor branches for:
Biceps femoris m.
Semimembranosus m.
Semitendinosus m

81
Q

label 1-3

A
  1. sciatic n
  2. tibial n
  3. Common fibular
    (peroneal) n
82
Q

Tibial nerve branches from what view

A

plantar view

83
Q

what nerve arises from L7, S1 spinal nerve

A

Tibial nerve

84
Q

is tibial nerve motor? if so, to which muscles

A

yes

Innervates:
– Gastrocnemius m.
– Superficial digital flexor m.
– Deep digital flexor m.
– Popliteus m

85
Q

is the tibial nerve sensory? if so, to what?

A
  • Divides into medial and lateral plantar nn.
    – Sensory to plantar surface of pes
86
Q

Deep and superficial fibular (peroneal) nerve branches from what view

A

dorsal

87
Q

Common fibular (peroneal) nerve divides into what 2 nerves

A
  • Deep fibular n (sensory and motor)
  • Superficial fibular n (sensory and motor)
88
Q

Superficial fibular n innervates what muscles

A

– Innervates:
* Lateral digital extensor m.
* Peroneus brevis m

89
Q

Deep fibular n. Innervates what muscles :

A
  • Cranial tibial m.
  • Long digital extensor m.
  • Peroneus longus m
90
Q

which nerve divides into deep and superficial peroneal (fibular) nn

A

Common fibular (peroneal) n

91
Q

what nerve branches innervate the extensors
of the tarsal joint and flexors of the digits

A

Tibial n

92
Q

what nerve branches innervate the flexors of the tarsal joint and extensors of the digits

A

Common fibular (peroneal) n

93
Q

If there is damage to the obturator nerve, what can the animal not do

A

pectineus, gracillis, adductor:
-ADDuct coxal joint

external obturator:
-rotate limb laterally at coxal joint

94
Q

if there is damage to the femoral nerve, what can the animal most likely no do

A

Iliopsoas:
-flex lumbar vertebrae and pelvis/coxal joint

quadricep femoris:
-extend stifle, flex coxal joint

sartorius:
-flex coxal joint
cr: extend stifle
cd: flex stifle

95
Q

if there is damage to the caudal cutaneous femoral nerve, what can the animal not do

A

feel caudal half of thigh

96
Q

if there is damage to caudal gluteal nerve what can the animal not do

A

superficial gluteal m: extend coxal joint or ABduct pelvic limb

97
Q

If there is damage to the cranial gluteal nerve what can the animal not do

A

middle and deep gluteal m:
-extend coxal joint
-ABduct pelvic limb
-rotate pelvic limb

piriformis
-extend coxal joint

tensor fascia lata:
-extend stifle
-flex coxal
-tense fascia lata

98
Q

If there is damage to the sciatic in the pelvis what can the animal not do

A

Internal obturator, Gemelli, quadratus femoris:

rotate limb laterally at coxal joint
extend coxal joint

99
Q

if there is damage to the sciatic nerve caudal to the hip, what cant the animal do

A

Bicep femoris, semitendinosis, semimembranosis:

extend coxal joint
various stifle actions
extend tarsocrural joint

100
Q

if there is damage to the common fibular nerve- deep, what cant the animal do

A

cranial tibial, long digital extensor

flex tarsal joint
extend digital joint

101
Q

if there is damage to the common fibular nerve- superficial, what cant the animal do

A

Lateral digital extensor:
extend digital joint at 5th digit

102
Q

if there is damage to the tibial nerve, what cant the animal do

A

gastrocnemius:
-flex stifle
-extend tarsocrural joint

SDF:
-flex stifle, metatarsophalangeal, proximal interphalangeal
-extend tarsocrural

DDF:
-extend tarsocrural
-flex metatarsophalangeal, proximal and distal interphalangeal

popliteus m.
-rotate stifle joint medially

CVM710: Anatomy (Shelby) (38 decks)

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