Lumbar Plexus

Question 1

What 6 nerves belong to the lumbar plexus

Answer 1

1. N. Iliohypogastricus
   >Ca&Fe: caudalis et cranialis
2. N. Ilioinguinalis
3. N. Genitofemoralis
4. N. Cutaneus femoris lateralis
5. N. Femoralis
6. N. Obturatorius

Question 2

What 6 nerves belong to lumbar plexus

Answer 2

1. N. Iliohypogastricus
2. N. Ilioinguinalis
3. N. Genitofemoralis
4. N. Cutaneus femoris lateralis
5. N. Femoralis
6. N. Obturatorius

Question 3

Nervus Iliophypogastricus

Answer 3

> Motor and sensory
Supplies abdominal muscles and skin
divided into caudal and cranial in ca and fe
Divides into Ramus cutaneus lateralis et medialis
From L1-L2

Question 4

Nervus Ilioinguinalis

Answer 4

> Sensory and motor
Supplies abdominal muscles and skin
Divides into ramus cutaneus lateralis et medialis
From L2-L3

Question 5

Nervus genitofemoralis

Answer 5

> Motor and sensory
Supplies mammary gland, skin surrounding vulva, prepuce & scrotum, and skin medial to femur
Passes through inguinal canal (genital branch)
Divides into Ramus genitalis and Ramus femoralis

Question 6

Nervus cutaneus femoris lateralis

Answer 6

> Motor and sensory
Passes proximally with deep circumflex iliac artery
Supplies the skin of stifle joint & Distal thigh
From L4-L5

Question 7

Nervus femoralis

Answer 7

> Motor (sensory)
From L3-L6
Supplies m. Iliopsoas, Quadriceps femoris, sartorius, pectineus & skin on medial surface
Has no cutaneus branches
Divides into N. Saphenus

Question 8

N. Femoralis: N. Saphenus

Answer 8

> Motor and Sensory
Goes through femoral canal
Supplies m. Sartorius, pectineus, gracilis, skin on crus, tarsus and metatarsus

Question 9

Nervus obturatorius

Answer 9

> Motor
From L6-S1
Supplies m. Adductor, pectineus, gracilis, obturatorius
Enters the foramen obturatorium

Question 10

Lumbar plexus location and supplies

Answer 10

> Lumbar nerves and first sacral nerves
Supplies abdomen, pelvic area, mammary gland, crus, tarsus, metatarsus

Question 11

What structures does N. Iliohypogastricus innervate?

Answer 11

Transversus abdominis, Obliquus internus
Abdominal muscles and skin

Question 12

What structures does N. Ilioinguinalis innervate?

Answer 12

Transversus abdominis, Obliquus internus, abdominal muscles and skin

Question 13

What structures does N. Genitofemoralis innervate?

Answer 13

Mammary gland, Skin surrounding vulva, prepuce and scrotum, Skin medial to femur

Question 14

What structures does N. Cutaneus femoris lateralis innervate?

Answer 14

Skin over distal thigh, stifle joint and psoas major muscle

Question 15

What structures does N. Femoralis innervate?

Answer 15

Iliopsoas, Quadriceps, Sartorius, Pectineus, skin on medial surfaces

Question 16

What structures does N. Saphenous innervate?

Answer 16

Sartorius, pectineus, gracilis, skin on medial aspect of crus - tarsus - and metatarsus

Question 17

What structures does N. obturatorius innervate?

Answer 17

Adductor, obturator, pectineus, gracilis and in (eq) the stifle joint