title: The ossification of the membraneous part of the squamous occipital bone in man.
abstract: The membranous part of the squamous occipital bone, above the highest nuchal line, develops from two pairs of centres and an occasional third pair, pre-interparietal, which may develop anterior to the interparietal centres. Previously it was considered that the pre-interparietal bone is found at the lambda, anterior to the interparietal, which is also a common site for the formation of sutural bones. In this study, on the basis of anomalies observed in a large series of skulls, sutural bones at the lambda are differentiated from the bone developed from the pre-interparietal centres. A separate pre-interparietal bone is identified by its shape and position. It is present behind the lambda within the territory of the membranous occipital bone.
mesh_terms: D003393:Cranial Sutures / Q000033:anatomy & histology; D006801:Humans; D008566:Membranes / Q000033:anatomy & histology; D009777:Occipital Bone / Q000033:anatomy & histology* / Q000502:physiology; D010012:Osteogenesis; D010294:Parietal Bone / Q000033:anatomy & histology