Wormian bones


Wormian bones
Wormian bones compared to a normal skull

Wormian bones, also known as extra sutural bones[1] are extra bone pieces that occur within a suture in the cranium. These are irregular isolated bones which appear in addition to the usual centers of ossification of the cranium and, although unusual, are not rare.[2] They occur most frequently in the course of the lambdoid suture, which is more "torturous" of a suture. They are also occasionally seen within the sagittal and coronal sutures. A large wormian bone at lambda is often referred to as an Inca bone (Os Incae),[3] 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.[4] 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 various diseases and important in the primary diagnosis of Brittle Bone Disease osteogenesis imperfecta [5]

Wormian bones may also be seen in: Pyknodysostosis, Rickets, "Kinky-hair" Menke's syndrome, Cleidocranial dysositosis, Hypoparathyroidism and Hypophosphatasia, otopalatodigital syndrome, primary acro-osteolysis and Down syndrome.

Contents

Derivation of the name

Ole Worm, Professor of Anatomy at Copenhagen, 1558–1654, He taught Latin, Greek, physics and medicine. Main contributions to science in embryology, Wormian bones of the skull have been named after him.

See also

References

  1. ^ Saladin, Kenneth (August 2006). Anatomy & Physiology: The Unity of Form & Function (4th ed.). McGraw-Hill. ISBN 0073316083. 
  2. ^ Gray, Henry; Warren Harmon Lewis (1918). Anatomy of the Human Body. Lea & Febiger. 
  3. ^ 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. http://archpedi.ama-assn.org/cgi/content/full/155/6/731. Retrieved 2008-11-02. 
  4. ^ Dr. Akram Abood Jaffar. "Sutural bones". Archived from the original on 2009-10-25. http://www.webcitation.org/query?url=http://www.geocities.com/akramjfr/sutural.html&date=2009-10-25+12:10:44. 
  5. ^ Glorieux FH, Osteogenesis Imperfecta, Best Practice & Research Clinical Rheumatology. 22:1, pp. 85-100. 2008

External links



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Look at other dictionaries:

  • Wormian bones — Wormian Wor mi*an, a. (Anat.) Discovered or described by Olanus Wormius, a Danish anatomist. [1913 Webster] {Wormian bones}, small irregular plates of bone often interposed in the sutures between the large cranial bones. [1913 Webster] …   The Collaborative International Dictionary of English

  • Wormian — Wor mi*an, a. (Anat.) Discovered or described by Olanus Wormius, a Danish anatomist. [1913 Webster] {Wormian bones}, small irregular plates of bone often interposed in the sutures between the large cranial bones. [1913 Webster] …   The Collaborative International Dictionary of English

  • wormian — Relating to or described by Ole Worm. * * * wor·mi·an (wurґme ən) named for Ole Worm (Olaus Wormius), Danish physician and humanist, 1588–1654, as wormian bones …   Medical dictionary

  • Wormian — /wûrˈmi ən/ adjective Associated with the name of the Danish anatomist Olaus Worm (1588–1654), applied esp to the supernumerary bones developed in the sutures of the skull …   Useful english dictionary

  • Wormian bone — Wor·mi·an bone wȯr mē ən n a small irregular inconstant plate of bone interposed in a suture between large cranial bones called also sutural bone Worm vȯrm Ole (Latin Olaus Wormius) (1588 1654) Danish physician. Worm was a professor of medicine …   Medical dictionary

  • Wormian bone — noun any of the tiny soft bones found in the sutures between cranial bones • Syn: ↑sutural bone • Hypernyms: ↑bone, ↑os * * * ˈwȯ(r)mēən noun Usage: usually capitalized W Etymology …   Useful english dictionary

  • Wormian bone — noun Any small irregular bone occasionally occurring in the the cranium in addition to the normal bones. Syn: sutural bone See Also: epipteric …   Wiktionary

  • wormian bone — one of a number of small bones that occur in the cranial sutures …   The new mediacal dictionary

  • Riolan bones — small bones resembling wormian (sutural) bones, sometimes found in the suture between the occipital bone and the petrous portion of the temporal bone …   Medical dictionary

  • Wormsche Knochen — (gelb markiert) Wormsche Knochen, auch als Worm Knochen (engl. wormian bones) bezeichnet, sind Schaltknochen des Schädels. Es handelt sich um kleine akzessorische Knochen innerhalb einer Schädelnaht. Die überzähligen Knochen stellen eine… …   Deutsch Wikipedia