Term
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Definition
T12 and L1-L4 Ventral Rami
Right and left lumbar plexuses
Anterior to transverse processes of lumbar vertebra, proximal to attachment of psoas major muscle
Innervation for the muscles of the anterior and medial thigh
Femoral nerve, obturator nerve |
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Term
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Definition
Largest nerve of lumbar plexus
Enters thigh by passing under INGUINAL LIGAMENT (ASIS to pubic tubercle)
Innervates iliacus, pectineus, and the anterior femoral muscles |
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Term
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Definition
Passes through the OBTURATOR FORAMEN to enter the medial thigh
Innervates most medial femoral muscles (NOT pectineus) |
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Term
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Definition
L4-L5 and S1-S4 Ventral Rami
Posterior/Lateral wall of true pelvis
Innervates posterior thigh and all of the leg and foot
Superior/inferior gluteal nerve, sciatic nerve, tibial nerve, common/superficial/deep fibular (peroneal) nerve, |
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Term
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Definition
Exits pelvis through greater sciatic foramen superior to piriformis muscle
Innervates gluteus medius, gluteus minimus, and tensor fasciae latae muscles |
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Term
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Definition
Exits pelvis through greater sciatic foramen inferior to piriformis muscle
Innervates gluteus maximus muscle |
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Term
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Definition
Largest nerve in body
All things distal to knee get signals through sciatic
Exits pelvis through greater sciatic foramen inferior to piriformis muscle
2/3 of the way down thigh it divides into tibial nerve and common fibular (peroneal) nerve |
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Term
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Definition
Medial division of sciatic nerve
Found in popliteal fossa
Innervates most of the posterior femoral muscles (not short head of BF) and posterior crural muscles
Divides into the lateral and medial plantar nerves (sole of foot) |
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Term
| Common Fibular (Peroneal) Nerve |
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Definition
Lateral division of sciatic nerve
Innervates short head of biceps femoris
Wraps around neck of fibula (very vulnerable
Divides into superficial and deep fibular (peroneal) nerves |
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Term
| Superficial Fibular (Peroneal) Nerve |
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Definition
Lateral branch of common fibular nerve
Innervates lateral crural muscles |
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Term
| Deep Fibular (Peroneal) Nerve |
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Definition
Medial branch of common fibular nerve
Innervates the anterior crural muscles
Passes into dorsum of foot |
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