Sacrococcygeal joint

Sacrococcygeal joint: Anatomy & FunctionJoints, ligaments and other structures that connect the sacrum and coccyx
~ 2 min

The sacrum is connected to the coccyx by a sacrococcygeal joint (articulatio sacrococcygea), which is essentially an intervertebral disc.

Sacrococcygeal joint (articulatio sacrococcygea)
Крестцово-копчиковый сустав (articulatio sacrococcygea)

This joint is strengthened by the following ligaments:

  • The lateral sacrococcygeal ligaments (ligamenta sacrococcygea lateralia) are paired, arise from the lower border of the lateral sacral crest and insert into the rudiment of the transverse process of the 1st coccygeal vertebra. They are similar to the intervertebral ligaments of the vertebral column.

Lateral sacrococcygeal ligaments (ligamenta sacrococcygea lateralia)
Lateral sacrococcygeal ligaments (ligamenta sacrococcygea lateralia)
  • The anterior sacrococcygeal ligament (ligamentum sacrococcygeum anterius) is located on the anterior surface of the sacrum-coccyx joint, is a continuation of the anterior longitudinal ligament.

    Anterior sacrococcygeal ligament (ligamentum sacrococcygeum anterius)
    Anterior sacrococcygeal ligament (ligamentum sacrococcygeum anterius)
  • The superficial posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius superficiale) starts from the edges of the sacral canal slit and attaches to the posterior surface of the coccyx, corresponds to the supracosteal ligament and ligamenta flava.

    Superficial posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius superficiale)
    Superficial posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius superficiale)
  • The deep posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius profundum) is located on the posterior surface of the bodies of the 1st coccygeal and the 5th sacral vertebrae, corresponds to the posterior longitudinal ligament.

Deep posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius profundum)
Deep posterior sacrococcygeal ligament (ligamentum sacrococcygeum posterius profundum)

The sacral and coccygeal corni are connected by sacrococcygeal syndesmosis (syndesmosis sacrococcygea).

Dictionary

Sacrococcygeal joint

Sacrococcygeal joint
articulatio sacrococcygea
Lateral sacrococcygeal ligaments
ligamenta sacrococcygea lateralia
Anterior sacrococcygeal ligament
ligamentum sacrococcygeum anterius
Superficial dorsal sacrococcygeal ligament
ligamentum sacrococcygeum posterius superficiale
Deep posterior sacrococcygeal ligament
ligamentum sacrococcygeum posterius profundum
Sacrococcygeal syndesmosis
syndesmosis sacrococcygea
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