The Dublin practice of midwifery / By Henry Maunsell.

  • Henry Maunsell
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: The Dublin practice of midwifery / By Henry Maunsell. Source: Wellcome Collection.

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    bones, and the three foetal subdivisions of each os innominatum — the ilium, ischium, and pubis are also respectively denominated the “ haunch,’’ ‘‘ sitting,” and “ shear ” bones. A knowledge of these vernacular names will often enable us to comprehend more clearly the descriptions of pa- tients, especially those in the lower classes of so- ciety. These different bones are connected to one another by four articulations. Two serve to unite the sacrum with the os in- nominatum of either side. These are denominated the sacro-iliac synchondroses, and possess remark- able strength, both from the manner in which the prominences and hollows of the opposed surfaces are, as it were, morticed into each other, and also from the strong bands of ligament stretched across the posterior and upper edges. A ligamentous expansion further strengthens the front of the articulation; but this is thin and membranous, that it may not, by its bulk, diminish the capacity of the pelvic cavity. Two other remarkable liga- ments on either side connect the sacrum and ossa innominata, but seem rather intended to complete the walls of the pelvis than to add security to the joint. These are the anterior and posterior sacro- sciatic ligaments, both arising from the sides of the sacrum and coccyx, and attached, the former to the spine and the latter to the tuberosity of the ischium.
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