piriformis (muscle)

pi·ri·for·mis (mus·cle)

[TA]

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 piriformis [TA], musculus pyriformis, piriform muscle

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