The so called Inca bone, also known as the preinterparietal bone, os Inca, Goethe's ossicle, and os ipactal is a triangular sutural bone located at the previous site of the posterior fontanelle. It is common and a normal variant. The Inca bone is one of the Wormian bones.
History and etymology
The Inca bone is so called because of the supposedly high incidence of Inca bones in Peruvian mummies 3.
- 1. S.B. Nayak and K.V. Soumya "Unusual sutural bones at pterion" International Journal of Anatomical Variations (2008) 1: 19–20
- 2. S.B. Nayak "Multiple Wormian bones at the lambdoid suture in an Indian skull" Neuroanatomy (2008) 7: 52–53
- 3. Marathe R, Yogesh A, Pandit S, Joshi M, Trivedi G. Inca - interparietal bones in neurocranium of human skulls in central India. (2010) Journal of neurosciences in rural practice. 1 (1): 14-6. doi:10.4103/0976-3147.63094 - Pubmed