Wormian bones - wikipedia Wormian bones Wormian bones ( Sutural bones ) Wormian bones compared to a normal skull Skull of a 21 - year - old man with Wormian bones Details Identifiers Latin Ossa suturale TA A02. 1.00. 043 FMA 59327 Anatomical terms of bone ( edit on Wikidata ) Wormian bones, also known as intra sutural bones, are extra bone pieces that occur within a suture ( joint ) in the cranium. These are irregular isolated bones that appear in addition to the usual centers of ossification of the cranium and, although unusual, are not rare. They occur most frequently in the course of the lambdoid suture, which is more tortuous than other sutures. They are also occasionally seen within the sagittal and coronal sutures. A large wormian bone at lambda is often called an Inca bone ( Os Incae ), due to the relatively high frequency of occurrence in Peruvian mummies. Another specific wormian bone, the pterion ossicle, sometimes exists between the sphenoidal angle of the parietal bone and the great wing of the sphenoid bone. They tend to vary in size and can be found on either side of the skull. Usually, not more than several are found in a single individual, but more than one hundred have been found in the skull of a hydrocephalic adult. Wormian bones are a marker for some diseases and important in the primary diagnosis of brittle bone disease : osteogenesis imperfecta. Wormian bones may also be seen in : Pycnodysostosis Osteogenesis imperfecta Rickets `` Kinky - hair '' Menke 's syndrome Cleidocranial dysostosis Hypothyroidism and hypophosphatasia Otopalatodigital syndrome Primary acro - osteolysis Down 's syndrome The causes can be remembered by the mnemonic `` PORKCHOPS ''. Contents 1 Derivation of the name 2 Additional image 3 See also 4 References 5 External links Derivation of the name Wormian bones are named for Ole Worm, professor of anatomy at Copenhagen, 1588 -- 1654. He taught Latin, Greek, physics and medicine. His description of the extra-sutural bones contributed to the science of embryology. Additional image Wormian bones at lambdoid suture. See also Human skull References Jump up ^ < radiopaedia.org/articles/wormian-bones > Saladin, Kenneth ( August 2006 ). Anatomy & Physiology : The Unity of Form & Function ( 4th ed. ). McGraw - Hill. ISBN 0 - 07 - 331608 - 3. Jump up ^ Gray, Henry ; Warren Harmon Lewis ( 1918 ). Anatomy of the Human Body. Lea & Febiger. Jump up ^ Parente, K ; Mercado - Deane, MG ; Brummund, T ( 2001 ). `` Radiological Case of the Month ''. Archives of pediatrics & adolescent medicine. 155 ( 6 ) : 731 -- 2. doi : 10.1001 / archpedi. 155.6. 731. PMID 11386967. Retrieved 2008 - 11 - 02. Jump up ^ Dr. Akram Abood Jaffar. `` Sutural bones ''. Archived from the original on 2009 - 10 - 25. Jump up ^ Glorieux FH, `` Osteogenesis Imperfecta, '' Best Practice & Research Clinical Rheumatology. 22 : 1, pp. 85 - 100. 2008 Jump up ^ Wormian Bones : Differential Diagnosis # 6, The Radiology Blog, published April 27, 2012 External links Wikimedia Commons has media related to Wormian bones. Google Books : Anatomy of the Human Body 00426 at CHORUS Photo Photo Retrieved from `` https://en.wikipedia.org/w/index.php?title=Wormian_bones&oldid=807801437 '' Categories : Skeletal system Hidden categories : Medicine infobox template using GraySubject or GrayPage Talk Contents About Wikipedia Deutsch Español Français Galego Italiano Nederlands Polski Português Română اردو Edit links This page was last edited on 30 October 2017, at 05 : 17. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: what is an example of a sutural bone
Answer: Inca bone