A vertebra is one of 33 bony segments that form the spinal column of humans. There are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 coccygeal vertebrae (the coccygeal vertebrae are fused into one coccyx bone).
Synonyms:
exact_synonym:
ABNORMAL VERTEBRAE; Abnormality of the vertebrae; Vertebral anomalies