Synonyms Os sacrum (Latin), Sacrum (English) Introduction The sacrum is characterized by its sphenoid shape. It is formed by the merging (synostosis) of the five sacral vertebrae. In humans, this fusion does not end until the growth phase is completed. The sacrum is the last section of the spinal column and encloses the rear part … Sacrum
Vortex number In some people, the uppermost cruciate vertebra is not fused with the other vertebrae. It appears that these individuals have six lumbar vertebrae instead of five. This phenomenon is also called lumbalization. This often gives the spine greater mobility, but also a lower load limit. Most of the time, people do not even … Vortex number | Sacrum
