Lumbar Plexus Flashcards
The lumbar plexus comes from which nerve roots?
T12-L5
T12, L1 nerve of lumbar plexus
Iliohypogastric Nerve
cutaneous innervation of Iliohypogastric nerve
skin above pubis
skin of lateral buttocks
motor innervation of Iliohypogastric n.
internal oblique
transverse abdominis
L1 nerve of Lumbar Plexus
Ilioinguinal Nerve
(mainly a cutaneous nerve)
Cutaneous innervation of Ilioinguinal n
Skin on proximal and medial thigh
Men: upper scrotum and root of penis
Women: Mons pubis and labia majora
Motor innervation of Ilioinguinal n
internal obliques
transvers abdominis
L1, L2 (anterior division of Lumbar Plexus)
Genitofemoral Nerve
cutaneous innervation of genitofemoral n
Men: scrotum
Women: Labia majora and anterior thigh superior to medial inguinal region
motor innervation of Genitofemoral N
Men: Cremaster m
L2, L3 nerve of Lumbar Plexus
Lateral Femoral Cutaneous N
cutaneous innervation of Lateral Femoral Cutaneous N
lateral skin of the thigh
peritoneum (gastrointestinal organs)
L2,L3,L4 anterior division of Lumbar Plexus (through obturator foramen)
Obturator Nerve
Obturator Nerve cutaneous innervation
Medial Thigh
Obturator Nerve Motor innervation
Adductor longus/magnus/brevis
Gracilis
obturator Externus
formed from the dorsal division of the ventral rami of L2, L3, L4
Femoral Nerve
Cutaneous branches of femoral n
-Anterior Femoral Cutaneous Branch
-Saphenous Branch
Anterior Femoral Cutaneous Branch innervation
anterior and Lateral thigh
Saphenous Branch innervation (cut.)
(cut)
medial hip jt
medial thigh
medial knee jt
medial calf
medial heel
Motor innervation of Femoral N
Illiacus
pectineous
Quadratus femoris
vastus medialis/ lateralis/ intermedialus
rectus femoris
sartorius
