Sacrococcygeal symphysis

Articular disc The sacrococcygeal disc or interosseus ligament is similar to the intervertebral discs ---> • The lateral sacrococcygeal ligaments run from the lower lateral angles of the sacrum to the transverse processes of the first coccygeal vertebra to complete the foramina for the last sacral nerve. Three lateral ligaments have been reported on either side. • The interarticular or intercornual sacrococcygeal ligaments stretches from the cornu of the sacrum to the cornu of the coccyx. == Function ==

Movements in the joint are restricted to flexion and extension. These essentially passive movements occurs during defecation and labour. When movements in the sacrum increase the anteroposterior diameter of the pelvic outlet, movements in the sacrococcygeal joint can further increase this diameter. == Clinical significance ==

The joint is palpable deep within the natal cleft, and can be felt as a horizontal groove. With the palpating finger on the dorsal surface of the coccyx, a degree of rotation can be produced with an applied forward pressure. ==See also==