Sacrococcygeal joint

Study entry

Classification

Secondary cartilaginous joint, with an intervertebral disc.

Surfaces

Apex of the sacrum and base of the coccyx, joined by fibrocartilage and ligaments.

Capsule

The anterior and posterior sacrococcygeal ligaments are long bands that reinforce the joint.

Movements

[CHECK: Moore does not describe it in the passages consulted (look in another source).]

Blood supply

Branches of the segmental arteries of the region: lumbar and iliolumbar, and lateral and median sacral, which supply the bones, the ligaments and the meninges of the segment.

Innervation

Coccygeal plexus (anterior rami of S4 and S5 and the coccygeal nerves), which lies on the pelvic surface of the coccygeus and supplies that muscle and the sacrococcygeal joint.

Source: cap. 6, «Articulación sacrococcígea»; cap. 6, plexo coccígeo

Other structures in this region

• Interosseous membrane of leg
• Obturator membrane
• Distal intertarsal joints (cuneonavicular, cuboideonavicular, intercuneiform and cuneocuboid)
• Triradiate cartilage of the acetabulum
• Hip joint
• Knee joint
• Superior tibiofibular joint
• Tibiofibular syndesmosis (inferior tibiofibular joint)