Definition of Piriformis
1. Noun. (anatomy) A muscle that rotates the thigh laterally. ¹
¹ Source: wiktionary.com
Medical Definition of Piriformis
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: musculus piriformis, musculus pyriformis, piriform muscle.
(05 Mar 2000)
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