PLEXUS LUMBALIS

Question 1

Nerves of the Plexus Lumbalis

Answer 1

Ventral branches of lumbar spinal nerves

1. N. Iliohypogastricus cranialis
2. N. Iliohypogastricus caudalis
3. N. Ilioingulinalis
4. N. Cutaneus Femoralis lateralis
5. N. Genitofemoralis
6. N. Femoralis
7. N.Obturatus

Question 2

Root - Nerve - Innervation of

L1

Answer 2

L1 - Iliohyp.cran - Abd.Muscles and Skin

Question 3

Root - Nerve - Innervation of

L2

Answer 3

L2 - Iliohyp.caudalis
R.lateralis: Skin and mulle of and.cavity, Medial side of tigh, combined with N.Ilioinguinalis.

R.Medialis: Inguinal region

Question 4

Root - Nerve - Innervation of

L3-L4 Cfl

Answer 4

L3-L4 - CUTANEUS Femoralis Lateralis
Skin, and lateral aspect of distal tigh.
M.tensor fascia Latae

Question 5

Root - Nerve - Innervation of

L3

Answer 5

L3 - Ilioinguinalis
M.Cremaster
M.Obliquus internus abdominalis
M. Transversus Abdoninis
Inguinal Mammary gland
Skin

Question 6

Root - Nerve - Innervation of

L3-L4 GF

Answer 6

L3-L4 - GENITOFEMORALIS
R.Genitalis: 
- Scrotum Testis
- Fascia Spermatica
- M.cremaster
- Mammilary complex
- Female vulva

R.Femoralis:

• Medial aspect of tigh
• Femoral Triangle/ Canalis Femoralis

Question 7

Root - Nerve - Innervation of

L4-L6 - F

Answer 7

L4-L6 - FEMORALIS

• M.iliopsoas
• 4 heads of quadriceps femoris
• M.sarorius cran//caud
• M.Pectineus
• -> N. SAPHENUS
• M.sartorius
• M.Pectineus
• M. Gracilis

Question 8

Root - Nerve - Innervation of

L4-L6 - O

Answer 8

L4-L6

• M.Pectineus
• M.Gracilis
• M. Obturatorius externen
• M. Adductor

= Adductor M. of HL

Question 9

N.Genitofemoralis

Answer 9

Runs parallel with External iliac a.
Devides into:
R.femoralis (Canalis Femoralis)
R.genitalis (Canalis Inguinalis)
- After the inguinal canal it runs parallel with A.Pudenda externa, branching out to the mammaryglands

Question 10

N.Obturatorius

Answer 10

Runs on the medial side, through foramen. obturatum
A.circumflex femoralis medialis crosses close to it
Devides into cranial and caudal branch
Innervates:
M.Adductor
M.obturatorius externen
M.Pectineus

Question 11

N.Femoralis

Answer 11

Hidden under the M.iliopsoas 
Goes out after the tendon
Has a Rami.muscularis, going to the canalis femoralis, supplying:
M.Quadriceps femoris
M.Sartorius
M.Pectineus
M.Iliospoas

A/V.Femoralis

Continues as N.Saphena (+V/a saphena)

• Sensory
• Terminating cranial, caudal and articulatio genus branches.

Question 12

Plexus lumbalis

INNERVATION & Intersp. diff

Answer 12

= Ventral branches of lumbar spinal nerves
INNERVATES:
- Medial and cranial muscles of the tigh
- Skin on medial side of the HL

INTERSP:
Ca,Su= 7
Eq, Bo = 6
= #of nerves // #of Lumbar Vertebras