Coccyx

Os coccygis

The coccyx is a small triangular bone at the inferior end of the vertebral column. It articulates superiorly with the sacrum at the sacrococcygeal joint. The coccygeal cornua project superiorly to articulate with the sacral cornua.

Type Bone
Body System Skeletal
Body Region Pelvis
Parent Structure bone of dorsum
Latin Name Os coccygis
FMA ID 20229

Function

The vestigial tailbone formed by fusion of 3-5 coccygeal vertebrae. Provides attachment for ligaments and muscles of the pelvic floor. Serves as a weight-bearing structure when sitting.

Clinical Significance

Coccydynia (tailbone pain) results from falls or prolonged sitting on hard surfaces. Coccygeal fractures and dislocations can occur during childbirth. Rarely, pilonidal cysts develop in the sacrococcygeal region.

Frequently Asked Questions

What is the Coccyx?
The coccyx is a small triangular bone at the inferior end of the vertebral column. It articulates superiorly with the sacrum at the sacrococcygeal joint. The coccygeal cornua project superiorly to articulate with the sacral cornua.
What is the function of the Coccyx?
The vestigial tailbone formed by fusion of 3-5 coccygeal vertebrae. Provides attachment for ligaments and muscles of the pelvic floor. Serves as a weight-bearing structure when sitting.
What body system is the Coccyx part of?
The Coccyx is part of the Skeletal.
What conditions affect the Coccyx?
Coccydynia (tailbone pain) results from falls or prolonged sitting on hard surfaces. Coccygeal fractures and dislocations can occur during childbirth. Rarely, pilonidal cysts develop in the sacrococcygeal region.
Where is the Coccyx located?
The Coccyx is located in the Pelvis region of the body.

Related Structures

articular surface articular system joint system articulation joint Atlas (C1) Atlas attachment site axial skeleton plus cranial skeleton skeleton axiale Axis (C2) Axis bone collagen fibril

Medical Disclaimer

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