Volume 1

Cyclopaedia of obstetrics and gynecology ... / [edited] by Egbert H. Grandin.

Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: Cyclopaedia of obstetrics and gynecology ... / [edited] by Egbert H. Grandin. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    parts of the base of tlie sacrum, and crosses the articular line whUe pass- ing towards the internal iliac fossa. The antero-iuferior ligament is formed by the periosteum of the first two anterior sacral foramina, and, like the superior ligament, becomes one with that of the iliac bones. The postero-superior ligament is composed of fibres which pass from the posterior part of the iliac crest, and from the subjacent roughened surface, to the tubercles situated on the outside of the first two posterior sacral foramina, and to the space between them, blending with the inter- osseous ligameni;. • The postero-inferior ligament is very thick, and may be divided into two layers: 1st, a superficial one, which is inserted above, on the posterior and superior iliac spine, and below, on the tubercle situated on the out- side of the third posterior sacral foramen. This is the sacro-spinal liga- ment of Bichat, and the posterior sacro-vertical of Cruveilhier. It ] Fig. 8.—Transverse Section op Posterior Portion of Pelvis. Sacro-iliac Symphtsis; Sac- Ro-SoiATic Lioambnts.—1, Transverse (liameter of pelvis. 2, Transverse diameter of superior strait. 3, Transverse diameter of inferior strait. blends at its internal edge with the aponeurosis which covers the spinal muscles, and, at its external edge, with the great sacro-sciatic ligament; 2d, a deep layer arising from the whole of the space between the tubercles situated outside of the second and third posterior sacral foramina. It is attached to the two posterior iliac spines and the notcli between them. The interosseous ligament, the strongest of all, occupies a deep cavity immediately behind the two articular facets. It is attached to the iliac tuberosity, and to two facets which are on the external apex of the first sacral foramen. The Synovial Membrane.—The sacro-iliac articulation has a synovial membrane which covers the internal face of the ligaments to the of the articular line. Its size does not exceed that of the line of articulation.