RDruzinsky
commented
5 years ago The pelvic floor and pelvic diaphragm are not synonymous. Snell's is not precisely correct. The pelvic floor, which separates the pelvic cavity from the perineum, is formed by a group of muscles called the pelvic diaphragm and a fascia or membranous wall associated with urogenital elements that pass through the floor. Gray's Anatomy for Students, 3rd ed., pg. 429, has a good description/definition.
Pelvic floor The pelvic floor, which separates the pelvic cavity from the perineum, is formed by muscles and fascia (Fig. 5.7). Two levator ani muscles attach peripherally to the pelvic walls and join each other at the midline by a connective tissue raphe. Together they are the largest components of the bowl- or funnel-shaped structure known as the pelvic diaphragm, which is completed posteriorly by the coccygeus muscles. These latter muscles overlie the sacrospinous ligaments and pass between the margins of the sacrum and the coccyx and a prominent spine on the pelvic bone, the ischial spine. The pelvic diaphragm forms most of the pelvic floor and in its anterior regions contains a U-shaped defect, which is associated with elements of the urogenital system. The anal canal passes from the pelvis to the perineum through a posterior circular orifice in the pelvic diaphragm. The pelvic floor is supported anteriorly by: ▪the perineal membrane, and ▪muscles in the deep perineal pouch. The perineal membrane is a thick, triangular fascial sheet that fills the space between the arms of the pubic arch, and has a free posterior border (Fig. 5.7). The deep perineal pouch is a narrow region superior to the perineal membrane. The margins of the U-shaped defect in the pelvic diaphragm merge into the walls of the associated viscera and with muscles in the deep perineal pouch below. The vagina and the urethra penetrate the pelvic floor to pass from the pelvic cavity to the perineum.
Robert E. Druzinsky, Ph.D. Clinical Associate Professor Dept. of Oral Biology College of Dentistry University of Illinois at Chicago 801 S. Paulina Chicago, IL 60612 druzinsk@uic.edu
Office: 312-996-0406 Lab: 312-996-0629 Website: www.peerj.com/RobertDruzinsky
On Wed, Dec 19, 2018 at 3:46 PM Christian Kleineidam < notifications@github.com> wrote:
FMA has a class [ http://xiphoid.biostr.washington.edu/fma/fmabrowser-hierarchy.html?fmaid=64856](Muscle of pelvic diaphragm) and Pelvic diaphragm http://xiphoid.biostr.washington.edu/fma/fmabrowser-hierarchy.html?fmaid=19726 .
On the other hand, oberon only seems to have Muscle of pelvic diaphragm and when I search pelvic diaphragm that's the only class that shows up.
On Wikidata we have at the moment a discussion on https://www.wikidata.org/wiki/Wikidata:Requests_for_deletions about whether pelvic diaphragm and pelvic floor are two different concepts. At the moment the Ukranian Wikipedia has articles for both and there's a reference to 9th edition of Snell's clinical Anatomy by region saying:
Inferior Pelvic Wall or Pelvic Floor. The floor of the pelvis supports the pelvic viscera and is formed by the pelvic diaphragm. The pelvic floor stretches across the pelvis and divides it into the main pelvic cavity above, which contains the pelvic viscera, and the perineum below. Pelvic Diaphragm is formed by the important levatores ani muscles and the small coccygeus muscles and their covering fasciae. It is incomplete anteriorly to allow passage of the urethra in males and the urethra and the vagina in females.
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cmungall
FMA has a class Muscle of pelvic diaphragm and Pelvic diaphragm.
On the other hand, oberon only seems to have Muscle of pelvic diaphragm and when I search
pelvic diaphragmthat's the only class that shows up.On Wikidata we have at the moment a discussion on https://www.wikidata.org/wiki/Wikidata:Requests_for_deletions about whether
pelvic diaphragmandpelvic floorare two different concepts. At the moment the Ukranian Wikipedia has articles for both and there's a reference to 9th edition of Snell's clinical Anatomy by region saying: