ABSTRACT
Anatomy The calvarium is formed from the membranous neurocranium, whereas the base of skull forms from the cartilaginous neurocranium [1]. Thus, the cranial vault undergoes intramembranous ossification, whereas the skull base is ossified via endochondral ossification. At birth, the bones of the cranium are separated by fibrous tissue. This fibrous tissue is continuous with both the periosteum externally and the dura mater internally.
