| A | B |
|---|
| L1 dermatome | innervates the groin |
| L3 | innervates the knee |
| L4 | innervates the great toe |
| L5 | the middle toes |
| S1 | the little toe |
| S2 | the middle of the posterior surface of the leg and thigh |
| T10 | umbilicus |
| L1, L2 | cremaster muscle |
| anterior scrotal nerves | L1 |
| posterior scrotal nerves | S2-S4 |
| posterior cutaneous nerve of thigh | S2, S3 |
| hip flexion | L2, L3 |
| HIP EXTENSION | L5, S1 |
| KNEE EXTENSION | L3, L4 |
| KNEE FLEXION | L5, S1 |
| DORSIFLEXION | L4, L5 |
| PLANTAR FLEXION | S1, S2 |
| FOOT EVERSION | L5, S1 |
| FOOT INVERSION | L4, L5 |
| DEEP FIBULAR ( PERONEAL) NERVE | WEB BETWEEN GREAT TOE |
| Ilioinguinal n. | (L1) |
| Iliohypogastric n. | (L1) |
| Genitofemoral n. | (L1-L2) |
| Lateral cutaneous nerve of the thigh | (L2-L3) |
| Femoral n. | (L2-L4) |
| Accessory obturator nerve | (L3, L4) |
| Obturator nerve | (L2-L4) |
| Lumbosacral trunk | (L4,L5) |
| •Sciatic nerve | (L4-S1) |
| •Pudendal nerve | (S2-S4) |
| •Superior gluteal nerve | (L4 -S1) |
| •Inferior gluteal nerve | (L5-S2) |
| anterior thigh supplying the flexors of the hip & extensors of the knee | Femoral Nerve: Passes deep to the inguinal ligament to the |
| NO pelvic structures are | supplied by the obturator nerve |
| if injured during surgery (removal of cancerous lymph nodes from lateral pelvic wall) | obdurator nerve causes painful spasms of thigh adductor ms. |
| Femoral Nerve: | Innervates muscles of the anterior compartment of the thigh |
| Largest branch of the lumbar plexus (L2-L4) | Femoral Nerve: |
| innervated by the femoral nerve | psoas and iliacus muscles |
| the femoral nerve travels … | posteriorlaterally through the pelvis |
| Innervates muscles of the medial compartment of the thigh | obdurator nerve |
| Saphenous Nerve | Terminal cutaneous branch of the femoral n. |
| Descends through the femoral triangle, lateral to the femoral sheath | Saphenous Nerve |
