Parietal bone
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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: the frontal, sphenoid, temporal, occipital, and contralateral parietal bone.
-<p>The<strong> parietal bone</strong> is a paired, irregular, quadrilateral skull bone that forms the sides and roof of the cranium. </p><h4>Gross anatomy</h4><p>The parietal bone has four borders, four angles, and external/internal surfaces, </p><p>Borders include: frontal, sagittal, occipital (half of lambdoid suture), and squamous temporal.</p><p>Angles include: sphenoid, mastoid, occipital, and frontal.</p><p>The external surface is convex and smooth. It features:</p><ul>- +<p>The<strong> parietal bone</strong> is a paired, irregular, quadrilateral skull bone that forms the sides and roof of the cranium. </p><h4>Gross anatomy</h4><p>The parietal bone has four borders, four angles, and external/internal surfaces.</p><p>Borders include: frontal, sagittal, occipital (half of lambdoid suture), and squamous temporal.</p><p>Angles include: sphenoid, mastoid, occipital, and frontal.</p><p>The external surface is convex and smooth. It features:</p><ul>
-</ul><h5>Articulations</h5><p>The parietal bone articulates with five other bones, the frontal, sphenoid, temporal, occipital, and contralateral parietal bone.</p><p> </p>- +</ul><h5>Articulations</h5><p>The parietal bone articulates with five other bones: the frontal, sphenoid, temporal, occipital, and contralateral parietal bone.</p>
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