In cranial synostosis scaphyocephaly there is premature closure of which suture?

Sagittal craniosynostosis, or scaphocephaly, occurs when ceain bones in a child's skull fuse prematurely. At bih, a child's skull is made up of several separate bones with growth plates (also called 'sutures') between them. Because the skull is not a solid piece of bone yet, the brain can grow and expand in size Reference Harrison20th edition pg 2776