piriformis
Piriformis muscle, m. piriformis, has the form of a flat isosceles triangle whose base starts from the anterior surface of the sacrum , lateral openings between the II and IV sacral pelvic holes. Converging the, muscle bundles directed outwards, out of the pelvic cavity through the greater sciatic foramen, foramen ischiadicum majus, and moving in a narrow and short tendons are attached to the top of the greater trochanter. At the attachment points of the muscles piriformis has a bag, bursa m. piriformis. Passing through the greater sciatic foramen, the muscle did not completely fill, leaving but the top and bottom edges of the small gap, through which the blood vessels and nerves.
Function: supiniruet thigh , and is also involved in his abduction.
Innervation: rr. musculares plexus sacralis [SI-SII (SIII)].
Blood supply: aa. gluteae superior et inferior.
Comments
Commenting, keep in mind that the content and the tone of your messages can hurt the feelings of real people, show respect and tolerance to his interlocutors, even if you do not share their opinion, your behavior in terms of freedom of speech and anonymity offered by the Internet, is changing not only virtual, but real world. All comments are hidden from the index, spam control.