Skull
The occipital, parietal, and temporal bones are seen in the posterior view of the skull.
Occipital bone
Centrally the flat or squamous part of occipital bone is the main structure in this view of the skull. It articulates superiorly with the paired parietal bones at the lambdoid suture and laterally with each temporal bone at the occipitomastoid sutures. Along the lambdoid suture small islands of bone (sutural bones or wormian bones) may be observed.
Several bony landmarks are visible on the occipital bone. There is a midline projection, (the external occipital protuberance) with curved lines extending laterally from it (superior nuchal lines). The most prominent point of the external occipital protuberance is the inion. About 1 inch (2.5 cm) below the superior nuchal lines two additional lines (the inferior nuchal lines) curve laterally. Extending downward from the external occipital protuberance is the external occipital crest.
Temporal bones
Laterally, the temporal bones are visible in the posterior view of the skull, with the mastoid processes being the prominent feature. On the inferomedial border of each mastoid process is a notch (the mastoid notch), which is a point of attachment for the posterior belly of the digastric muscle.
Temporal bones
Laterally, the temporal bones are visible in the posterior view of the skull, with the mastoid processes being the prominent feature. On the inferomedial border of each mastoid process is a notch (the mastoid notch), which is a point of attachment for the posterior belly of the digastric muscle.
Sources :
- Gray's Anatomy for Students, 2nd Edition ( 817 – 818 ) .
- Gray's Anatomy for Students, 2nd Edition ( 817 – 818 ) .
Copyright © 2009 by Churchill Livingstone
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