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Department of Neurobiology and Developmental Sciences: Human Structure Module
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  9. Joints and Ligaments of the Pelvis and Perineum

Joints and Ligaments of the Pelvis and Perineum

Joint or ligamentDescriptionNotes
iliolumbar ligamenta ligament that connects the transverse process of the L5 vertebra to the iliac crestthe iliolumbar ligament stabilizes the lumbosacral joint
lumbosacral jointthe articulation between the L5 vertebral body and the body of the first sacral segment a symphysis; this articulation is characterized by all of the features of a typical intervertebral articulation which include: an intervertebral disk, anterior and posterior longitudinal ligaments, synovial joints between articular processes, ligamenta flava, interspinal and supraspinal ligaments; a strong iliolumbar ligament strengthens this joint
pubic symphysisthe midline joint uniting the superior rami of the two pubic bonesa symphysis; a fibrocartilage interpubic disk unites the bones; the subpubic angle in the female is greater than the subpubic angle in the male
sacroiliac jointthe articulation between the ala of the sacrum and the auricular surface of the iliuma synovial joint; the fibrous articular capsule is thickened dorsally and ventrally to form the sacroiliac ligaments; because of the interlocking nature of the joint surfaces and the strong sacroiliac ligaments, only limited movement is permitted at the sacroiliac joint
sacrospinous ligamentthe ligament that connects the ischial spine to the lateral surface of the sacrum and coccyxtogether with the sacrotuberous ligament, it converts the greater and lesser sciatic notches into greater and lesser sciatic foramina
sacrotuberous ligamentthe ligament that connects the ischial tuberosity to the lateral surface of the sacrum and coccyxtogether with sacrospinous ligament, it converts the greater and lesser sciatic notches into greater and lesser sciatic foramina
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