Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Lumbar Plexus (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Lumbar Plexus (Ex. III) > Flashcards

Flashcards in Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Lumbar Plexus (Ex. III) Deck (11)
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1

pre-terminal branches

genitofemoral n. (L1-L2) *on top of psoas major*
- genital and femoral cutaneous branches
- genital branch --> cremaster **runs through spermatic cord**
obturator n. (L2-L4) *deep to M psoas major*
- cutaneous branch
- adductor magnus (from P branch)
- obturator externus (direct)
- adductor longus; adductor brevis; gracilis; pectineus (from A branch)

2

terminal branches

subcostal n. (T12) *under rib 12*
iliohypogastric n. (T12-L1)
- A and L cutaneous branches
- transversus abdominis; I internal oblique
ilioinguinal n. (L1)
- A scrotal/labial nn.
- transversus abdominis; I internal oblique
L femoral cutaneous n. (L2-L3) *on iliacus I to iliac crest*
femoral n. (L2-L4) *deep to L psoas major*
- iliopsoas; pectineus; sartorius; quadriceps femoris
- A cutaneous branch; saphenous branch
lumbosacral trunk (L4-L5)
- gives rise to pudendal n.

3

short, direct branches from T12-L4

psoas major
quadratus lumborum
iliacus
intertransversarii lumborum

4

sexually

subcostal n. (T12)

5

interested

iliohypogastric n. (T12-L1)

6

individuals

ilioinguinal n. (L1)

7

love

L femoral cutaneous n. (L2-L3)

8

flexible

femoral n. (L2-L4)

9

ladies

lumbosacral trunk (L4-L5)

10

roots

T12-L5

11

go

genitofemoral n. (L1-L2)
obturator n. (L2-L4)

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