A treatise on the science and practice of midwifery . ges, that of the sacrumbeing the thicker. These are firmly united, but, in the female, accord-ing to Mr. Wood,1 they are always more or less separated by an inter-vening synovial membrane. Posterior to these cartilaginous convexsurfaces there are strong interosseous ligaments passing directly frombone to bone, filling up the interspace between them and uniting themfirmly. There are also accessory ligaments, such as the superior andanterior sacro-iliac, which are of secondary consequence. The posteriorsacro-iliac ligaments, however, are of g
A treatise on the science and practice of midwifery . ges, that of the sacrumbeing the thicker. These are firmly united, but, in the female, accord-ing to Mr. Wood,1 they are always more or less separated by an inter-vening synovial membrane. Posterior to these cartilaginous convexsurfaces there are strong interosseous ligaments passing directly frombone to bone, filling up the interspace between them and uniting themfirmly. There are also accessory ligaments, such as the superior andanterior sacro-iliac, which are of secondary consequence. The posteriorsacro-iliac ligaments, however, are of great obstetric importance. Theyare the very strong attachments which unite the rough surfaces onthe posterior iliac tuberosities to the posterior and lateral surfaces of thesacrum. They pass obliquely downward from the former points, andsuspend, as it were, the sacrum from them. According to Duncan, thesacrum has nothing to prevent its being depressed by the weight of thebody but these ligaments, and it is mainly through them that the weight Fig. Section of Pelvis and Heads of Thigh-bones, showing the Suspensory Action of the Sacro-iliac Ligaments. (After Wood.) of the body is transmitted to the sacro-cotyloid beams and the heads ofthe femora. Sacro-sciatic Ligaments.—The sacro-sciatic ligaments are instrumentalin completing the canal of the pelvis. The greater sacro-sciatic liga-ment is attached by a broad base to the posterior-inferior spine of theilium and to the posterior surfaces of the sacrum and coccyx. Its fibresunite into a thick cord, cross each other in an X-like manner, and again Todds Cyclopaedia of Anatomy and Physiology, article Pelvis, p. 123. 38 ORGANS CONCERNED IN PARTURITION. expand at their insertion into the tuberosity of the ischium. The lessersacro-sciatic ligament is also attached with the former to the back partsof the sacrum and coccyx, its fibres passing to their much narrowerinsertion at the spine of the ischium, and converting the sacro-sciati
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
