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Origins, Insertions and Actions of the Muscles of the Pelvic Girdle & Hip Joint

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vunakege's version from 2016-11-03 05:57

Origins, Insertions & Actions

MuscleOriginInsertionAction
Iliacusinside surface of the iliumlesser trochanter of the femur and shaft just belowflexes the hip
Psoas MajorBodies, transverse processes and intervertebral discs of all of the lumbar verterbrae and T12top of the femur (shares a tendon with the iliacus)ORIGIN FIXED - flexes the hip INSERTION FIXED - pulls on the spine to increase lumbar lordosis UNILATERALLY - assists in lateral flexion of the trunk. Stabilises the lumbar spine
Gluteus Maximusbase of the spine (sacrum and cocyx) and the back of the iliumiliotibial tract (ITT) and femurextends and laterally rotates the hip
Gluteus Minimusouter surface of the iliumlaterally on top of the femurabducts and laterally rotates the hip. Important in hip stabilisation during running/walking. Prevents pelvis dipping and knees rolling inwards
Gluteus Mediusouter surface of the iliumlaterally on top of the femurabducts the hip. Posterior fibres laterally rotate the hip. Important in hip stabilisation during running/walking. Prevents pelvis dropping and knees rolling inwards
Piriformisanterior surface of sacrumtop of the femur (greater trochanter)abducts the hip. Assists in lateral rotation. If hip is already flexed, may assist in medial rotation
Tensor Fascia Lataeiliac crestiliotibial tractflexes the hip. Abducts the hip. Medially rotates the hip
SartoriusAnteriorly and laterally on the iliac spine and crestmedially on the tibiaflexion and lateral rotation of the hip and flexion of the knee
Adductor (brevis, longus, magnus)pubismedial and posterior surface of the femuradduct the hip
Pectineuspubisfemuradducts and flexes the hip
Gracilispubistop of the tibia (just below the knee joint)adducts the hip. Assists in knee flexion (helps the hamstrings)
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