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PNS > Lumbar Spinal Nerves > Flashcards

Lumbar Spinal Nerves Flashcards

1
Q

How many pairs of lumbar nerves are there?

A

5

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2
Q

Each lumbar nerve root five dies into an _____ and ______ _____ _____

A

Anterior and posterior primary ramus

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3
Q

The posterior primary rami of lumbar nerves divide into ____ and _____ branches

A

Medial and lateral

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4
Q

The medial branch of the posterior primary ramus of a lumbar nerve supplies what?

A

Multifidi

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5
Q

What supply the multifidi in lumbar nerves?

A

The posterior medial branch of the lumbar nerve

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6
Q

What do the lateral branches of the posterior primary ramus of a lumbar nerve supply?

A

Erector spinae group

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7
Q

What supply the erector spinae group?

A

The lateral branches of the posterior primary ramus of lumbar nerves

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8
Q

The anterior primary rami of lumbar nerves contribute to ____ and ___ ______

A

Lumbar and sacral plexuses

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9
Q

The lumbar spinal nerves have communications with the sympathetic ganglia via what 3 mechanisms?

A
  1. 4 lumbar sympathetic ganglia
  2. White rami communicans with L1, L2, L3 (sometimes)
  3. Gray rami communicans (all lumbar nerves)
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10
Q

What forms the lumbar plexus?

A

Anterior primary rami of L1-L3, L4 (sometimes)

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11
Q

The lumbar plexus receives contribution from _____ besides the rami of L1-L4, by way of a communication from the ___ nerve

A

T12

Via L1 nerve

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12
Q

Muscular branches from the anterior rami of the lumbar plexus supply what muscles?

A
  1. Quadratus lumborum
  2. Paola’s major
  3. Posts minor
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13
Q

What supply the quadratus lumborum, Psoas major/minor

A

The muscular branches of the lumbar plexus

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14
Q

L1 supplies?

A

Quadratus lumborum, psoas minor

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15
Q

L2 supplies?

A

QL, psoas major/minor

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16
Q

L3 and L4 suppply?

A

QL, psoas major

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17
Q

What makes up the iliohypogastric nerves?

A

T12, L1

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18
Q

The iliohypogastric nerve travels ___ and ____ between the ____ and ______.

A

Anterior and inferior

QL and kidney

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19
Q

After the iliohypogastric nerves travels between the QL and kidney its travels through the ____ _____ and between the ____ ____ _____.

A

Transverse abdominus, internal abdominal oblique

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20
Q

The iliohypogastric nerve gives off what branch and then continues as what branch?

A

Lateral cutaneous

Anterior cutaneous branch

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21
Q

What does the anterior cutaneous branch of the iliohypogastric nerve supply?

A

Skin of pubic region

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22
Q

What supplies the skin of the public region?

A

Anterior cutaneous branch of the iliohypogastric nerve

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23
Q

The iliohypogastric nerve gives off a lateral cutaneous nerve branch that supplies what?

A

Posterolateral gluteal region

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24
Q

What supplies the posterolateral gluteal region?

A

Lateral cutaneous branch of the iliohypogastric nerve

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25
Q

What muscles does the iliohypogastric nerve supply?

A

Internal abdominal oblique

Transverse abdominal

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26
Q

What supply the internal abdominal oblique and the transverse abdominal muscles

A

Iliohypogastric nerve

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27
Q

What make up the ilioinguinal nerve?

A

T12 and L1

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28
Q

The ilioinguinal nerve enter the _____ ____. It leaves this via the superficial ring and travels with the ____ _____.

A 
Inguinal canal
Spermatic cord (round ligament in females)
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29
Q

What is the sensory ilioinguinal nerve supply in males and females?

A

Upper medial thigh
Male: base of penis and anterior scrotum
Female: mons pubis, labium majus

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30
Q

What supplies the upper medial thigh and base of the penis and anterior scrotum in males and mons pubis and labium majus in females?

A

Ilioinguinal nerve

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31
Q

What muscles does the ilioinguinal nerve supply?

A

Internal abdominal oblique
Transverse abdominal

** note iliohypogastric also supplies these

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32
Q

What makes up the genitofemoral nerve?

A

L1 and L2

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33
Q

The genitofemoral nerve passes _____ through the _____ ____ and then divides into a _____ and ____ branch

A

Anterior
Psoas major
Genital and femoral branch

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34
Q

The genital branch of the genitofemoral nerve (L1/L2) Enters and travels through the ____ _____, then leaves and has motor supply to _______ and sensory supply to what?

A

Inguinal canal
Cremaster muscles
Sensory: superior anterior scrotum, and mons pubis and labium majus

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35
Q

What supplies the cremaster muscle and superior anterior scrotum, mons pubis, and labium majus?

A

Genital branch of the genitofemoral nerve

36
Q

The femoral branch of the genitofemoral nerve passes into the thigh _____ to the ____ _____ and supplies what skin?

A

Posterior
Inguinal ligament
Skin of upper anterior thigh

37
Q

What supplies the skin of the upper anterior thigh?

A

Femoral branch of the genitofemoral nerve (L1 L2)

38
Q

What makes up the lateral cutaneous nerve of the thigh?

A

L2 and L3

39
Q

What does the lateral cutaneous nerve of the thigh (L2 L3) supply?

A

Sensory only to skin of lateral thigh, SUPERIOR to the knee

40
Q

What supplies the skin of the thigh superior to the knee?

A

Lateral cutaneous nerve of the thigh (L2 L3)

41
Q

The lateral cutaneous nerve of the thigh leaves the abdominal cavity by passing under the ____ _____ and travels anterior to the ______ through the ____ _____ to reach the skin

A

Inguinal ligament
Sartorius
Fascia Lata

42
Q

What is the largest branch of the lumbar plexus?

A

Femoral nerve

43
Q

What makes up the femoral nerve?

A

L2, L3, L4

44
Q

The femoral nerve forms posterior to the ___ ____ and emerges _____ to the ____ and anterior to the ______

A

Psoas major
Lateral
Psoas major
Iliacus

45
Q

After emerging lateraly front the psoas major the femoral nerves passes _____ to the ______ _____ and enters the _______ ______ lateral to the femoral artery

A

Posterior
Inguinal ligament
Femoral triangle

46
Q

After entering the femoral triangle the femoral nerve runs inferior through the ____ _____ into the leg, ______ to the knee

A

Adductor canal

Medially

47
Q

Where does the femoral nerve give of branches?

A

Abdomen and femoral triangle

48
Q

What branches does the femoral nerve give off within the abdomen?

A

Muscular branches to the iliacus and pectineus

Also sends fibers to femoral artery

49
Q

Once the femoral nerve passes posterior and beyond the inguinal ligament the nerve dives into an _____ and _____ division

A

Anterior and posterior

50
Q

The anterior division of the femoral nerve (after passing the inguinal canal) gives rise to what 3 nerves?

A
  1. Intermediate cutaneous nerve of the thigh
  2. Medial cutaneous nerve of the thigh
  3. Nerve to the sartorius
51
Q

The intermediate cutaneous nerve of the thigh further divides into branches that supply what?

A

Skin on anterior thigh down to knee

Other branch communicates with femoral branch of genitofemoral nerve

52
Q

What nerve supplies the skin on the anterior thigh down to the knee and has a communicating branch with the femoral branch of the genitofemoral nerve?

A

Intermediate cutaneous nerve of the thigh

53
Q

The medial cutaneous nerve of the thigh crosses anterior to the femoral artery and supplies what?

A

Skin to medial thigh, medial knee, knee across to the lateral patella
Some supply medial thigh through communicans with the saphenous nerve

54
Q

What nerve supplies the medial thigh, medial knee, and knee to lateral patella, some of medial thigh though communications with saphenous nerve?

A

Medial cutaneous nerve of the thigh

55
Q

The posterior division of the femoral nerve gives rise to ______ and ____ branches

A

Muscular and vascular

56
Q

The muscular branches of the femoral nerve supply what?

A

(Quadriceps muscles)

  1. Sartorius
  2. Rectus femoris
  3. Vastus lateralis
  4. Vastus medialis
  5. Vastus intermediaries
57
Q

What supply the quadriceps muscles?

A

The muscular branch of the posterior division of the femoral nerve

58
Q

What do the vascular branches of the femoral nerve supply? (Before continuing as the saphenous nerve)

A

Femoral artery and branches, and articular branches to the knee joint

59
Q

What supply the femoral artery and articular branches to the knee joint before continuing on as the saphenous nerve?

A

Vascular branches of the posterior division of the femoral nerve

60
Q

The saphenous nerve is transmitted through the _____ _____ and within it crosses the femoral artery, the nerve being medial when emerging.

A

Adductor canal

61
Q

What does the saphenous nerve supply after it exits the adductor canal medial to the femoral artery?

A

Skin medial and anterior to the patella

62
Q

In the leg the saphenous nerve travels with the ____ _____ ____ and supplies what?

A

Great saphenous vein

Skin of medial leg and foot

63
Q

What supplies the skin of the anterior and medial patella, and medial leg and foot?

A

Saphenous nerve

64
Q

Clinical considerations for the femoral nerve?

A

Patellar reflex

Sensory deficits

65
Q

What forms the obturator nerve?

A

L2-L4

66
Q

What is the main fiber of the obturator nerve?

A

L3

67
Q

The obturator nerve travels _____ to the psoas major, but _____ to the iliac vessels, descends to pelvis and travels on the _____ ______

A

Medial
Posterior
Obturator internus

68
Q

The obturator internus leaves the pelvis through the ____ ___ and divides into an _____ and ______ which are separated by the obturator external and adductor brevis

A

Obturator canal

Anterior and posterior branch

69
Q

The anterior branch of the obturator nerve passes _______ to the obturator externus and adductor brevis and ______to pectineous and adductor longus

A

Anterior

Posterior

70
Q

The anterior branch of the obturator nerve sends some communicating branches to branches of the _______ nerve, forming the ______ _______

A

Femoral

Subsartorial plexus

71
Q

What creates the subsartorial plexus?

A

Communicating branches between the obtorutor and femoral nerves

72
Q

What does the subsartorial plexus supply?

A

Skin on the medial thigh

73
Q

What supplies skin of the medial thigh?

A

Subsartorial plexus

74
Q

The anterior branch of the obturator nerve terminates supplying what>

A

Femoral A.

75
Q

To where does the anterior branch of the obturator nerve send articular branches?

A

Hip joint

76
Q

The hip joint receives articular branches from what nerve?

A

Anterior branch of obturator

77
Q

The obturator nerve sends muscular branches to what 4 muscles?

A
  1. Adductor longus
  2. Gracilis
  3. Pectineus
  4. Adductor brevis
78
Q

What nerve supplies adductor longus and brevis, pectineus, and gracilis?

A

Muscular branches from the anterior branch of the obturator nerve

79
Q

The anterior branch of the obturator nerve may also send branches to connect with the _____ ____ ____ if present

A

Accessory obturator nerve

80
Q

The anterior branch of the obturator nerve may send communicating branches with the medial cutaneous nerve of the thigh (ant. Femoral branch) and the saphenous nerve (term. N. Of femoral N. )
What supply do these communications give?

A

Sensory to skin on upper medial side of the leg

81
Q

If the obturator nerve also has a sensory supply to the upper medial side of the leg what additional communications may be present?

A

Medial cutaneous nerve of the thigh and the saphenous

82
Q

The posterior branch of the obturator nerve travels through the ______ _____, posterior to the adductor brevis and anterior to the adductor magnus.

A

Obturator externus

83
Q

The posterior branch of the obturator nerve sends muscular branches to where?

A

Obturator externus and adductor magnus/brevis

84
Q

The posterior branch of the obturator N sends articular fibers to where?

A

The knee joint

85
Q

Clinical considerations regarding the obturator nerve?

A
  1. Muscular weakness

2. Sensory deficits

PNS (8 decks)

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