• Lumbrosacral plexus provides motor and sensory nerve to abdominal wall, pelvis, and perineum. • Sacral plexus posterior region of lower limb, except small head of biceps femoris • Sacral nerve (roots L4, L5, S1, S2, S3) • the thickest nerve of the body is sciatic • Composed of common peroneal and tibial nerve • Common peroneal nerve composed of dorsal rami • Tibial nerve composed of ventral rami (L4-S3) • L4-L5 is lumbosacral trunk • Osteoperosis is bone thinning due to lack of calcium (estrogen causes shrinking of kypphoris) • Congenital dislocation of the hip • Loose hip effects female babies • Treatment is to splint or harness femur together – double diapers • Superior gluteal artery gives blood supply to gluteal minimus and medius • Gluteal maximus is supplied by inferior gluteal artery • Positive trendenlenberg sign – stand on one side and if hip drops • Negative trendelenberg sign – hips are even • Postive shows damage to superior gluteal nerve – drops other side of damaged
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