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origin insertions and actions - gym instructor

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Muscles - upper leg, back, hip
Origin
Insertion
Action
Gluteus maximus   show femur   hip extension (move thigh to the rear)  
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illipsoas hip flexor made up of 2 muscles (iliacus+psosas major)   show femur   hip flexion & lateral rotation of thigh  
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show pubis and ischium   femur   Brevis/longus - hip adduction, flexion & rotation - Magnus hip adduction flexion, extension & medial rotation  
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gluteus minimus   show femur   hip abduction (moving away from centreline of body)  
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gluteus medius   show femur   hip abduction (move leg away from centreline of body)  
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rectus abdominus   pubis   ribs and sternum   show
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external obliques   show crest of pelvis & mid line of rectus adominus   lateral flexion of the vertebrae (rotate torso/stablizes abdomen)  
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transverse absominus (deep)   ilium, lumbar vertebrae, last 6 ribs   show compress the abdomen (acts as a natural weight belt keeping insides in)  
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erector spinea   show cervical, thoracic, lumbar vertebrae and the ribs   lumbar and thoracic vertebrae extension  
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show thoracic and lumbar vertebrae, last 6 ribs, sacrum and ilium   humerus   shoulder adduction (pulls arm down towards pelvis)  
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internal obliques   show ribs   compresses the abs - vertebrae lateral flexion (singularly)  
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show sacrum ilium & vertebrae   all above   verebral extension & rotation  
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quadratus lumborum - lower back base of spine   ilium   show vertebral flexion & stabilisation  
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Created by: allisonhearsum
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