Os parietale

The parietal bone is a paired, irregular, quadrilateral skull bone that forms the sides and roof of the cranium.

Gross anatomy

The parietal bone has four borders, four angles, and external/internal surfaces.

Borders include: frontal, sagittal, occipital (half of lambdoid suture), and squamous temporal.

Angles include: sphenoid, mastoid, occipital, and frontal.

The external surface is convex and smooth. It features:

• parietal eminence
• superior temporal line for attachment of temporalis fascia
• inferior temporal lines for attachment of temporalis muscle
• parietal foramen contains an emissary vein to superior sagittal sinus

The internal surface is concave and features:

• groove for middle meningeal vessels
• groove above: forms sagittal sulcus

Articulations

The parietal bone articulates with five other bones: the frontal, sphenoid, temporal, occipital, and contralateral parietal bone.

Siehe auch:

• Schädel

und weiter:

• skull