Anatomical Relations
The inferior fascia of the pelvic diaphragm is a thin sheet that is continuous with the obturator fascia. It extends inferomedially from the tendinous arch of levator ani to cover the inferior surface of the levator ani muscle. It forms the roof of the perineum and forms the medial wall of the ischioanal fossa. It also blends with the deep perineal fascia below, fascia on the urethral sphincter, and external anal sphincter (Standring, 2016).
Structure
The superior and inferior fasciae of the pelvic diaphragm are a part of the two-layered parietal pelvic fascia which separates the pelvic cavity from the perineal structures below. The inferior fascia of the pelvic diaphragm is made up of elastic fibers and is thinner than the superior fascia of the pelvic diaphragm.
Function
The concave pelvic diaphragm is known as the floor of the true pelvic cavity. It supports the pelvic organs, contributes to the reduction intra-abdominal pressure and the regulation of pressure during micturition and defecation.
References
Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.
Function
The concave pelvic diaphragm is known as the floor of the true pelvic cavity. It supports the pelvic organs, contributes to the reduction intra-abdominal pressure and the regulation of pressure during micturition and defecation.
