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Lower Extremities Homework 2 Nancy Nesyto-Freske Dec. 2, 2014 Iliopsoas: Psoas major – O –transverse processes of T-12-L1-5 as well as bodies of lumbar vert I – lesser trochanter of femur A flex the hip, lateraly rotate the hip, adduct the hip Psoas minor - O-Body and transverse process of first lumbar vert I – superior ramus of pubis A-Assist to create lordotic curvature in the lumbar spine. Tilt pelvis posteriorly Iliacus – O- Iliac fossa I-Lesser trochanter A-flex the hip, laterally rotate the hip, adduct the hip Deep External Hip Rotators Piriformis – O-Anterior surface of sacrum I greater trochanter Quadratus femoris – O-lateral border of ischial tuberosity I intertrochanteris crest, between greater and lesser trochanters Obturator internus O-obturator membrane and inferior surface of obturator foramen I – medial surface of greater trochanter Obturator externus – o – surperior and inferior rami of pubis I-trochanteric fossa of femur Gemellus superior – O-Ischial spine I-Upper border of greater trochanter Gemellus Inferior – O- Ischial tuberosity I Upper border of greater trochanter All perform action of laterally rotating the hip Abductors Gluteus maximus – O-coccyx, edge of sacrum, posterior iliac crest, sacrobuberous and si ligaments. I-gluteal tuberosity (upper fibers) iliotibial tract (lower fibers) – A. extends the hip, laterally rotates the hip, abducts the hip. Lower fibers adduct the hip Gluteus medius – O- gluteal surface of the ilium between the iliac crest and posterior and anterior gluteal lines – I Greater trochanter, A Abduct the hip, anterior fibers flex and medially rotate the hip, posterior fibers extend and laterally rotate the hip G. minimus – O- gluteal surface of the ilium between the iliac crest and posterior and anterior gluteal lines I – anterior border of greater trochanter, A-Abduct the hip, medially rotate the hip, flex the hip Tensor fasciae latae- O-iliac crest, posterior to the ASIS, I-Iliotibial tract, Aflex the hip, medially roate the hip, abduct the hip Sartoriius – O-anterior superior iliac spine, I-proximal, medial shaft of the tibia at pes anserinus tendon, A-flex the hip, laterially rotate the hip, abduct the hip, flex the knee, medially rotate the flexed knee Piriformis (when hip is flexed) -O-Anterior surface of sacrum I greater trochanter Internal Hip rotators Semitendinosus - O-ischial tuberosity I proximal, medial shaft of the tibia at pes anserinus tendon A flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, tilt the pelvis Semimembranosus - O-ischial tuberosity I – posterior aspect of medial condyle of tibia A flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, tilt the pelvis Glute med (anterior fibers) – see above under abductors Glute minimus – see above under abductors Adductor magnus – O-inferior ramus of the pubis, ramus of ischium and ischial tuberosity, I-medial lip of linea aspera and adductor tubercle A. longus – O-Pubic tubercle I medial lip of linea aspera A. brevis – O-Inferior ramus of pubis I-Pectineal line and medial lip of linea aspera Gracilis – O-Inferior ramus of pubis and ramus of ischium I-Proximal, medial shaft of tibia at pes anserinus tendon Pectineus – O-Superior ramus of pubis, I Pectineal line of femur Tensor fasciae latae – see under abductors above Adductors Adductor magnus – see above under internal hip rotators A. longus - see above under internal hip rotators A. brevis - see above under internal hip rotators Pectineus - see above under internal hip rotators Gracilis 0- see above under internal hip rotators Iliacus – see above under Iliopsoas Glute max – lower fibers see above under abductors Hamstrings Biceps femoris – long head-I-ischial tuberosity, short head – lateral lip of linea aspera, I- head of the fibula, A- flex the knee, laterally rotate the flexed knee, extend the hip, laterally roate the hip, tilt the pelvis posteriorly Semitendinosus – O-ischial tuberosity I proximal, medial shaft of the tibia at pes anserinus tendon A flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, tilt the pelvis Semimembranosus – O-ischial tuberosity I – posterior aspect of medial condyle of tibia A flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, tilt the pelvis Quadriceps – all extend the knee, rectus femors flex the hip Rectus femoris – O- anterior inferior iliac spine I tibial tuberosity Vastus lateralis – O- lateral lip of linea aspera, gluteal tuberosity I Tibial tuberosity Vastus medialis – o – medial lip of linea aspera I – tibial tuberosity Vastus intermedius – anterior and lateral shaft of the femur