Lower Limb for Test 1 (Emily)

Lower Limb for Test 1 (Emily) - Lower Limb Pelvis Bones...

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Unformatted text preview: Lower Limb Pelvis Bones Pelvic Girdle : AKA hip girdle • Functions: o Attaches the lower limbs to the spine o Supports the visceral organs of the pelvis • The full weight of the upper body passes through this girdle o Connected to the axial skeleton by some of the strongest ligaments in the body Less freedom of movement in lower limbs, but much more stable • Composed of: o The paired Hip bones AKA coxal bone OR an os coxae (os= bone; coxa=hip) The hip bones are joined together anteriorly and with the sacrum posteriorly • Bony pelvis: deep, basinlike structure formed by the hip bones, sacrum and coccyx Hip Bone (or coxal bone or os coxae) • *Bone marrow biopsy and transplantation • During childhood it is composed of 3 separate bones, in adulthood these bones fuse • Composed of: o Acetabulum : Y shaped junction of the ilium, ischium and pubis A deep hemispherical socket on the lateral pelvic surface Receives the ball-shaped head of the femur at the hip joint o 1) Ilium : large, flaring bone that forms the superior region of the hip bone Consists of: • Body : inferior region • Ala (“wing”): superior region, wing-like • Iliac crest : thickened superior margin of the ala o *Bone grafting from iliac crest o Many muscles attach to the crest o Composed of: Tubercle of the iliac crest : thickest point Anterior superior iliac spine: blunt, anterior end of iliac crest • Prominent anatomical landmark Posterior superior iliac spine : sharp, posterior end of iliac crest • Position is indicated by butt dimples on back • Anterior inferior iliac spine • Posterior inferior iliac spine • Greater sciatic notch : the sciatic nerve (largest nerve in the body) passes through this notch to enter the posterior thigh • Gluteal surface: broad posterolateral surface of the illium o Crossed by 3 ridges: Posterior gluteal line Anterior gluteal line Inferior gluteal line o These lines define the attachment sites of the gluteal (butt) muscles • Iliac fossa : broad concavity on the internal surface of the iliac ala • Auricular surface “ear shaped”: posterior to the iliac fossa, roughened surface that articulates with the sacrum o Forms the sacroiliac joint (with sacrum) o Weight of the body is transmitted from the vertebral column to the pelvis through this joint • Arcuate line “bowed”: robust ridge that runs anteriorly and inferiorly from the auricular surface o Helps define the superior boundary of the true pelvis The inferior part of the Ilium joins the ischium posteriorly and the pubis anteriorly...
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This note was uploaded on 01/28/2011 for the course HSC 3733 taught by Professor Dr.mohtashemsamsam during the Spring '10 term at University of Central Florida.

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Lower Limb for Test 1 (Emily) - Lower Limb Pelvis Bones...

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