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Muscles of pelvis O=Origin I=Insertion IN= Innervation A= Action

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itlitunifam's version from 2017-08-03 07:38

Origin of muscles

Question Answer
Gluteus Maxiumus OExternal surface of ilium (Posterior to POSTERIOR gluteal line, sacrum & coccyx)
Gluteus Medius OExternal surface of ilium (between ant and post gluteal lines)
Gluteus Minimus OExternal surface of ilium (between ant and inferior gluteal lines)
Piriformis OANTERIOR surface of sacrum
Obturator internus OObturator membrane + surrounding bones
Gemellus superior OSUPERIOR ischial spine
Gemellus inferior OIschial Tuberosity
Quadratus femoris OLATERAL border of ischial tuberosity
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Insertions of muscles

Question Answer
Gluteus Maxiumus IMost insert > lateral condyle of tibia via iliotibial tract (IT BAND) but some insert on GLUTEAL TUBEROSITY
Gluteus Medius IGreater Trochanter of femur (lateral surface)
Gluteus Minimus IGreater Trochanter (anterior surface)
Piriformis ITrochanteric fossa (medial surface of greater trochanter)
Obturator internus ITrochanteric fossa (medial surface of greater trochanter)
Gemellus superior + Gemellus inferior ITrochanteric fossa (medial surface of greater trochanter)
Quadratus femoris IQuadrate tubercle on TROCHANTERIC CREST
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Nerve innervation

Question Answer
Gluteus Maxiumus INInferior GLUTEAL nerve
Gluteus Medius INSuperior gluteal nerve
Gluteus Minimus INSuperior gluteal nerve
Piriformis INDONT WORRY ABOUT THIS XD
Obturator internus INDONT WORRY ABOUT THIS XD
Gemellus superior + inferior INDONT WORRY ABOUT THIS XD
Quadratus femoris INDONT WORRY ABOUT THIS XD
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Actions of muscle

Question Answer
Gluteus Maxiumus AFORCEFUL EXTENSION + LATERAL ROTATION
Gluteus Medius AAbducts + medially rotates thigh. keeps pelvis level when opposite leg is raised
Gluteus Minimus AAbducts + medially rotates thigh. keeps pelvis level when opposite leg is raised
Piriformis ALaterally rotate thigh, ABDUCTS a FLEXED thigh and steady hip joint
Obturator internus ALaterally rotate thigh, ABDUCTS a FLEXED thigh and steady hip joint
Gemellus superior + inferior ALaterally rotate thigh, ABDUCTS a FLEXED thigh and steady hip joint
Quadratus femoris ALaterally rotate thigh and steadies hip joint ONLY
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