Lumbar plexus and derivative nerves, muscles, and lesions of the lower extremity 

This is a brief video on the neuromusculature of lower extremity, specifically the lumbar plexus and derivative nerves, muscles, and lesions of the lower extremity.
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I created this video with the RU-vid Video Editor.
ADDITIONAL TAGS:
Scrotum/labia majora
Through inguinal canal
Ilioinguinal n. (L1)
(sensation)
Lateral femoral cutaneous n. (L2, L3)→ beneath inguinal ligament
Sensation to anterolateral thigh
Genitofemoral n. (L1, L2)
Genital branch
Femoral branch → under inguinal l.
Sensation to area on proximal/ anterior thigh
Femoral n. (L2-L4) with psoas and iliacus branches
Beneath inguinal ligament, thru femoral triangle
Anterior thigh muscles:
Hip flexors: pectineus, sartorius, psoas major + iliacus = iliopsoas (deep to inguinal lig., to lesser trochanter of hip) (also laterally rotate hip)
Knee extensors: quadriceps (rectus femoris, vastus medialis (branch thru adductor canal), vastus lateralis, vastus intermedius) → continue as patellar tendon into tibial tuberosity
Obturator n. (L2-L4)
Through obturator canal
Medial thigh muscles:
Hip adductors: adductor longus, adductor brevis, gracilis, adductor magnus (except hamstring portion)
Lat hip rotator: obturator externus
Sacral nerves
Lumbosacral trunk (L4-5)
Hip fracture (femur neck fracture) → leg is shortened and laterally rotated bc of iliopsoas muscle
Femoral a and v pass through adductor magnus → adductor hiatus
Pectineus - flexes and adducts the hip
Sartorius - long, thin hip abduct, ext rot, flex
Gracilis - long, thin hip adductor, used for muscle grafts
Insert into pes anserinus: “goose footâ€
Anterior branch → sensory to medial thigh region
Meralgia - entrapment causes burning pain and/or paresthesia to outer thigh
Terminates as saphenous (longest sensory nerve)
Saphenous and vastus medialis branch go thru adductor canal