module 12 anatomy
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| Gluteus Maximus Origin | ilium posterior and dorsal surface of sacrum
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| Gluteus Maximus Insertion | lateral condyle of tibia, gluteal tuberosity of femur
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| Gluteus Maximus Nerve | inferior gluteal nerve (L5, S1, S2)
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| Gluteus Maximus Action | extends thigh, assists lateral rotation
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| Gluteus Medius Origin | ext surface of ilium bw anterior and posterior gluteal lines
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| Gluteus Medius Insertion | lateral surface of greater trochanter of femur
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| Gluteus Medius Nerve | superior gluteal nerve (L5, S1) (same as gluteus minimus)
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| Gluteus Medius Action | ABducts and laterally rotates thigh; keeps pelvis level when opposite leg is raised
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| Gluteus Minimus Origin | ext surface of ilium bw anterior surface of ilium bw ant and inf gluteal lines
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| Gluteus Minimus Insertion | anterior surface of greater trochanter of femur
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| Gluteus Minimus Nerve | Superior gluteal nerve (L5, S1)
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| Gluteus Minimus Action | ABducts and medially rotates thigh; keeps pelvis level when opposite leg raised
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| Piriformis Origin | anterior surface of sacrum and sacrotuberous ligament
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| Piriformis Insertion | piriformis fossa
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| Piriformis Nerve | branches of ventral rami of S1, S2
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| Piriformis Action | Laterally rotates extended thigh; ABducts flexed thigh; steady femoral head in acetabulum
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| Obturator Internus Origin | pelvic surface of obturator membrane
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| Obturator Internus Insertion | trochanteric fossa of femur
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| Obturator Internus Nerve | nerve to obturator internus (L5, S1)
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| Obturator Internus Action | Lateral rotation extended thigh, ABduction in flexed thigh, steady femoral head in acetabulum
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| Gemellus Superior Origin | Ischial Spine
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| Gemellus Superior Insertion | blends with obturator internus tendo to attach to greater trochanter of femur
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| Gemellus Superior Nerve | Nerve to obturator internus (L5, S1)
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| Gemellus Superior Action | Laterally rotates extended thigh; abducts flexed thigh; steadies femoral head in acetabulum
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| Gemellus Inferior Origin | ischial tuberosity
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| Gemellus Inferior Insertion | gemellus blends with obturator internus tendon and attaches to greater trochanter of femur
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| Gemellus Inferior Nerve | nerve to quadratus femoris (L5, S1)
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| Gemellus Inferior Action | laterally rotates extended thigh and abducts flexed thigh; steadies femoral head in acetabulum
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| Quadratus Femoris Origin | lateral border of ischial tuberosity
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| Quadratus Femoris Insertion | quardate tubercle on introchanteric crest of femur and area inferior to it
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| Quadratus Femoris Nerve | nerve to quadratus femoris (L5, S1)
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| Quadratus Femoris Action | laterally rotates extended thigh and abducts flexed thigh; steadies femoral head in acetabulum
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| Obturator Externus Origin | margins of obturator foramen and obturator membrane
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| Obturator Externus Insertion | trochanteric fossa of femur
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| Obturator Externus Nerve | obturator nerve (L3, L4)
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| Obturator Externus Action | laterally rotates extended thigh and abducts flexed thigh; steady femoral head in acetabulum
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| Biceps Femoris - Long Head Origin | ischial tuberosity
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| Biceps Femoris - Long Head Insertion | lateral side of head of fibula; tendon is split by fibular collateral knee ligament
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| Biceps Femoris - Long Head Nerve | sciatic nerve (L5, S1, S2)
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| Biceps Femoris - Long Head Action | flexes leg and rotates it laterally when knee flexed; extends thigh at hip joint
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| Semitendinosus Origin | ischial tuberosity
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| Semitendinosus Insertion | medial surface of superior part of tibia
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| Semitendinosus Nerve | sciatic nerve (L5, S1, S2)
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| Semitendinosus Action | extend thigh; flex leg and rotate it medially with knee flexed
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| Semimembranosus Origin | ischial tuberosity
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| Semimembranosus Insertion | posterior part of medial tibial condyle; reflective attachment forms oblique popliteal ligament to lateral femoral condyle
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| Semimembranosus Nerve | Sciatic nerve (L5, S1, S2)
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| Semimembranosus Action | extends thigh, flexes leg and rotate it medially with knee flexed
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| Adductor Magnus Origin | adductor part: inferior ramus of pubis, ramus of ischium;
hamstring part: ischial tuberosity
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| Adductor Magnus Insertion | adductor part: gluteal tuberosity, linea aspera, medial supracondylar line
hamstring part: adductor tubercle of femur
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| Adductor Magnus Nerve | adductor part: obturator nerve (L2, L3, L4)
hamstring part: sciatic nerve (L4)
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| Adductor Magnus Action | adductor part: adducts thigh; adductor part; flexes thigh
hamstring part: extends thigh
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| What are the muscles of the gluteus region? | gluteus maximus, gluteus minimus, gluteus medius, piriformis, obturnator internus, superior gemellus, inferior gemellus, quadratus femoris, obturator exturnus
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| What are the muscles of the hamstrings? | biceps femoris - long head, biceps femoris - short head, semimembranosus, semitendinosus
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| Which of the hamstrings does not cross both the hip and knee? | biceps femoris - short head
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| Which of the hamstrings is not innervated by the tibial division of the sciatic nerve? | biceps femoris - short head
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| What muscles laterally rotate extended thigh, abduct flexed thigh, and steady femoral head in acetabulum? | Piriformis, obturator internus, gemellus superior and gemellus inferior
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| Biceps Femoris - Short Head Origin | linear aspera and lateral and lateral supracondylar line of femur
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| Biceps Femoris - Short Head Insertion | lateral side of head of fibula; tendon is split by fibular collateral knee ligament
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| Biceps Femoris - Short Head Nerve | sciatic nerve - L5, S1, S2
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| Biceps Femoris - Short Head Action | flexes leg and rotates it laterally
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Created by:
wrenlette
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