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Piriformis fascia
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    Piriformis fascia

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    Piriformis fascia
    Identifiers
    TA98 A04.5.03.011
    TA2 2437
    FMA 19134
    Anatomical terminology

    The fascia of the Piriformis is very thin and is attached to the front of the sacrum and the sides of the greater sciatic foramen; it is prolonged on the muscle into the gluteal region.

    At its sacral attachment around the margins of the anterior sacral foramina it comes into intimate association with and ensheathes the nerves emerging from these foramina.

    Hence the sacral nerves are frequently described as lying behind the fascia.

    The internal iliac artery, internal iliac vein, and their branches, on the other hand, lie in the subperitoneal tissue in front of the fascia, and the branches to the gluteal region emerge in special sheaths of this tissue, above and below the Piriformis muscle.

    Public domainThis article incorporates text in the public domain from page 421 of the 20th edition of Gray's Anatomy (1918)



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