Coccyx Contusion Anatomy
To better understand coccyx contusion, it helps to understand the anatomy of the sacrum and coccyx.
The sacrum is part of the pelvis, while the coccyx is the lowest part of the spine. The sacrum forms part of the ring of the pelvis.
The spine is made up of many parts. It is supported by an upright row of stacked spine bones, called vertebrae. This column of bone starts under the skull and continues to the buttocks. All the vertebrae have flexible joints except those in the sacrum.
- Papadopoulos EC, Khan SN. Piriformis syndrome and low back pain: a new classification and review of the literature. Orthop Clin North Am. 2004 Jan;35(1):65-71. 
- Rugulies R, Krause N. Job strain, iso-strain, and the incidence of low back and neck injuries. A 7.5-year prospective study of San Francisco transit operators. Soc Sci Med. 2005 Jul;61(1):27-39.