. The science and art of midwifery. Fig. 88.—Section through the left saero-iliac articulation (natural size). (Xuschka.) synovial membrane, limiting a narrow but well-defined middle third of the iliac surface is convex, and fits into a corre-sponding concave depression on the sacral end. There is likewise a. Fig. 89.—Section of symphysis. (Luschka.) ** bite or ledge in front, formed by the ilium, which aids in prevent-ing the sacrum from slipping forward into the pelvic cavity. The office of maintaining the sacrum in position devolves chiefly MECHANISM OF LABOR. 15; npon the
. The science and art of midwifery. Fig. 88.—Section through the left saero-iliac articulation (natural size). (Xuschka.) synovial membrane, limiting a narrow but well-defined middle third of the iliac surface is convex, and fits into a corre-sponding concave depression on the sacral end. There is likewise a. Fig. 89.—Section of symphysis. (Luschka.) ** bite or ledge in front, formed by the ilium, which aids in prevent-ing the sacrum from slipping forward into the pelvic cavity. The office of maintaining the sacrum in position devolves chiefly MECHANISM OF LABOR. 15; npon the ligaments distributed front and rear, and particularly uponthe very numerous and closely interwoven bundles extending from thetuberosities of the sacrum to the roughened portions, or tuberosities,of the ilia, which project posteriorly beyond the articulation. The symphysis pubis is likewise supplied with a small cavity, onlythe posterior portion of which possesses a synovial membrane. Thefibro-cartilage between the articulating surfaces of the bones is thickerin front than behind. The anterior ligaments are more developed thanthe posterior ones, and allow no movements of importance to takeplace in the non-pregnant condition. The Pelvic Ligaments.—In addition to the ligaments which havealready been noticed as contr
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
