What is the parietal bone and where is it located?

The parietal bone is a quadrilateral, curved plate that forms the major portion of the top and sides of the skull vault. One bone lies on each side of the sagittal suture, articulating with adjacent cranial bones.

What are the key features of the parietal bone's external and internal surfaces?

External surface: Smooth and convex with the parietal eminence and superior/inferior temporal lines. Internal surface: Concave, overlies the brain's parietal lobe, and displays structures like the half sagittal sulcus, granular pits, and grooves for meningeal arteries.

Which bones does the parietal bone articulate with at its borders?

The parietal bone articulates with the opposite parietal bone at the sagittal suture, frontal bone at the coronal suture, occipital bone at the lambdoid suture, and temporal and sphenoid bones at the inferior border.

What are the four angles of the parietal bone and their anatomical landmarks?

The four angles are the anteroinferior (sphenoidal) angle at the pterion, anterosuperior (frontal) angle at the bregma, posteroinferior (mastoid) angle at the asterion, and posterosuperior (occipital) angle at the lambda.

What clinical significance does the parietal bone have?

Clinically, it has poor regenerative capacity after injury due to its periosteum structure. An accessory suture (a rare anomaly) may mimic a fracture but is usually bilateral.

Parietal Bone – Anatomy, Borders & Sutures

❓ Frequently Asked Questions

What is the parietal bone and where is it located?

What are the key features of the parietal bone's external and internal surfaces?

Which bones does the parietal bone articulate with at its borders?

What are the four angles of the parietal bone and their anatomical landmarks?

What clinical significance does the parietal bone have?