Additional pediatric resources: GeneralPediatrics.com | PediatricEducation.org | SearchingPediatrics.com
Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
The skull has 3 embryonic divisions: (1) cerebral capsule (meninges, calvarium, scalp), (2) face, and (3) floor of the skull. The cerebral capsule and the face are formed directly from mesenchymal tissue via intramembranous bone formation which is dependent on brain growth, and their sutures close at variable times. The floor of the skull develops via enchondral ossification which is not dependent on brain growth, and its sutures close at a fixed time. By 8 years old brain growth is 95% complete. Synchondrosis is the cartilaginous interface between or within enchondral bones. The intersphenoid synchondrosis disappears by 1 year while the the sphenooccipital synchondrosis disappears in adolescence / early adulthood.
See References Chapter.
Section Top | Title Page
Please send us comments by filling out our Comment Form.
All contents copyright © 1992-2017 Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D. and the authors. All rights reserved.
"Virtual Pediatric Hospital", the Virtual Pediatric Hospital logo, and "A digital library of pediatric information" are all Trademarks of Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D.
Virtual Pediatric Hospital is funded in whole by Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D. Advertising is not accepted.
Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.
The information contained in Virtual Pediatric Hospital is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.