CHP10TheMuscularSystem

Medius minimus abduct medially rotates femur minimus

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Unformatted text preview: wer limb- adapted for less precision & Muscles less more strength than upper limbs (tables 10.17-19) more Muscles of femur typically originate @ coxaeMuscles Muscles of the Hip Muscles 2 anterior muscles of the hip= iliopsoas; flexes hip, swings leg forward, & raises thigh upward forward, • Deep tissue muscles w/ origins @ iliac fossa & lumbar vert’s, inserts as a single tendon on lesser trochanter inserts Tensor fascia latae (lateral side of hip)= flexes hip, abducts & medially rotates femur, braces knee when on 1 foot medially • Origin @ iliac crest, inserts on lateral condyle of tibia 3 gluteal muscles (posterior)= maximus, medius, minimus • Gluteus maximus= llargest, extends hip, abducts/laterally rotates argest, femur; important in backswing of stride, climbing stairs femur; • Origin @ ilium & sacrum, inserts on gluteal tuberosity of femur & Origin fascia lata • G. medius & minimus= abduct & medially rotates femur, minimus abduct maintains balance during walking maintains • Origin @ ilium, inserts on greater trochanter Muscles of the Femur Muscles Fascia lata= fibrous sheath encircles thigh & tightly binds fibrous muscle groups together muscle • Laterally combines w/ tendons of gluteus maximus & tensor Laterally gluteus fasciae latae to form iliotibial band which braces knee fasciae Anterior compartment of thigh- ‘‘quads’ extend knee, flex & quads’ Anterior laterally rotates hip laterally • Quadriceps femoris has 4 heads= rectus femoris, vastus rectus lateralis, vastis medialis, & vastus intermedius lateralis vastis • Origin & insertions (Table 10.18): spines of ilium, surfaces of Origin femur (greater trochanter, linea aspera, anterior & lateral surfaces of diaphysis, etc.); inserts on patella, tibial tuberosity, condyles of tibia condyles • Sartoris= runs diagonal across thigh (ilium to tibial tuberosity) • Longest muscle of body Longest body • Flexes hip (& knee), rotates femur medially (‘crossing legs’) Muscles of the Femur (cont.) Muscles Medial compartment of thigh- adducts femur adducts • Adductor group= adductor longus, brevis, & magnus (10.17) adductor brevis • Gracilis= also flexes knee, medially rotates tibia • Origin @ pubis, inserts on medial aspect of proximal tibia Posterior compartment- ‘‘hamstrings’ to flex knee, extend hip hamstrings’ (walk/run) (walk/run) • • • Hamstring muscles often injured in running/sprinting sports Origins & insertions (Table 10.18) Biceps femoris= origin differ for 2 heads, insert on fibula head; origin also laterally rotates tibia on femur & femur in acetebulum also • Semimembranosus= also medially rotates tibia & femur, also tenses knee • Semitendinosus= same as semimembranosus Popliteus muscle= unlocks knee to allow flexion • Origin @ lateral condyle, inserts on posterior proximal tibia Leg & Foot Muscles Leg Dors...
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This note was uploaded on 01/12/2014 for the course ZOO 250 taught by Professor Staff during the Fall '08 term at S.E. Louisiana.

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