Osteology of Head & Neck - Parietal Bone

Parietal bone - These paired bone
Flat bone
Feature - Surfaces - External & Internal
Borders - Anterior, Posterior, Superior & Inferior
Angles - Antero superior, Antero inferior, Postero superior & Posteroinferior.
External Surface presents Parietal tuber, temporal lines, parietal foramen
Internal surface shows vascular markings of middle meningeal vessels, impressions of gyri
Superior border presents sulcus for superior sagittal sinus
posteroinferior angle presents groove for sigmoid sinus
Two lines corresponding to central sulcus and Posterior ramus of lateral sulcus can be drawn on the internal surface
Anterior border articulates with Frontal bone
Posterior Border articulates with Occipital bone
Superior border articulates with opposite side parietal bone
Inferior border articulates with greater wing of sphenoid, squamous part & mastoid part of temporal bone
Anteriosuperior angle forms bregma
Posterosuperior angle forms lambda
Anteroinferior angle forms pterion
Posteroinferior angle forms asterion
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