The Probert Encyclopaedia of Medicine

PARIETAL BONES

The parietal bones are two of the flat cranial bones that form the roof and upper sides of the calvarium. The parietal bones are attached to each other by the sagittal suture which runs longitudinally along the roof of the skull, and both of the parietal bones are attached to the frontal bone by the coronal suture and to the occipital bone in back by the lambdoid suture. The intersection of the two parietal bones and the occipital bone is called the 'lambda' after its resemblance to that Greek letter. The sphenoid and temporal bones on each side of the skull are attached to the lower edge of the parietal bone by the squamous suture. Two ridges traverse the side of the parietal bone, extending to the frontal bone and forming a depression with the temporal fossa. These two ridges are called the superior and inferior temporal lines.
Research Parietal Bones