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Definition: muscle extending from pelvis into gluteal region; origin, margins of pelvic sacral foramina and greater sciatic notch of ilium; insertion, upper border of greater trochanter; action, rotates thigh laterally; nerve supply, nerve to piriformis (sciatic plexus).
Synonym(s): musculus piriformisTA, musculus pyriformis, piriform muscle
Examples: glitazone, GI cocktail, etc.
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