Sacrococcygeal symphysis

Sacrococcygeal symphysis
Articulations of pelvis. Posterior view.
Latin	articulatio sacrococcygea, symphysis sacrococcygea
Gray's	subject #80 309
Dorlands/Elsevier	a_64/12161515

The sacrococcygeal symphysis (sacrococcygeal articulation, articulation of the sacrum and coccyx) is an amphiarthrodial joint, formed between the oval surface at the apex of the sacrum, and the base of the coccyx.

Ligaments

It is homologous with the joints between the bodies of the vertebrae, and is connected by similar ligaments. They are:

• Anterior sacrococcygeal ligament
• Posterior sacrococcygeal ligament
• Lateral sacrococcygeal ligament
• Interposed fibrocartilage ligament
• Interarticular ligament

Movements

The movements which take place between the sacrum and coccyx, and between the different pieces of the latter bone, are forward and backward; they are very limited. Their extent increases during pregnancy.

See also

• Coccyx
• Coccydynia (coccyx pain, tailbone pain)
• Ganglion impar

External links

• sacrococcygeal+joint at eMedicine Dictionary

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.