PARIETAL BONES
\pˈaɹa͡ɪ͡ətə͡l bˈə͡ʊnz], \pˈaɹaɪətəl bˈəʊnz], \p_ˈa_ɹ_aɪə_t_əl b_ˈəʊ_n_z]\
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Two corresponding lateral bones of the head including top of skull not belonging to frontal or occipital bones.
By William R. Warner
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Are two fellow-bones, occupying the lateral and upper parts of the cranium, in the formation of which they assist. They have a quadrilateral shape: their external surface is convex, and presents, at its middle part, an eminence called the Parietal protuberance, Tuber parietale, (F.) Bosse parietale. Their inner or cerebral surface, which is concave, has a depression that corresponds with the preceding eminence, and which is called the Parietal fossa, fossa parietalis. Above and behind, near the superior edge of these bones, is a foramen, which does not always exist, called the Parietal foramen, Foramen parietale, through which passes a vein- parietal vein- that opens into the superior longitudinal sinus of the dora mater: and an artery-parietal artery-a branch of the occipital, which ramifies on the same sinus. Each parietal bone is articulated above, with its fellow; below, with the temporal bone: before, with the frontal; behind, with the occipital, and by the anterior and inferior angle with the great ala of the sphenoid. Each parietal bone is developed from a single point of ossification.
By Robley Dunglison
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