. Text-book of anatomy and physiology for nurses. orth or sidewise, as in opening and closing the mouthand masticating the food. Surgical notes.—If the mouth be suddenly opened verywidely, as in hearty laughing, dislocation easily results—that is,the condyles glide too far forward and slip in front of the fossa. THE SKULL AS A WHOLE. 25 making it impossible to close the mouth. To correct this condition(or reduce the dislocation) press the jaw forcibly downivardand backward with the thumbs placed upon the molar teeth. (Firstwrap the thumbs with a napkin to protect them, as the mouthwill close s
. Text-book of anatomy and physiology for nurses. orth or sidewise, as in opening and closing the mouthand masticating the food. Surgical notes.—If the mouth be suddenly opened verywidely, as in hearty laughing, dislocation easily results—that is,the condyles glide too far forward and slip in front of the fossa. THE SKULL AS A WHOLE. 25 making it impossible to close the mouth. To correct this condition(or reduce the dislocation) press the jaw forcibly downivardand backward with the thumbs placed upon the molar teeth. (Firstwrap the thumbs with a napkin to protect them, as the mouthwill close suddenly.) POINTS OF INTEREST IN CONNECTION WITH THESKULL AS A WHOLE. The Cranium. The cranium is a firm, strong case for the brain, composedlargely of flat bones, the layers of these fiat bones being called thetables of the skull. The innermost table is very brittle and maybe fractured by a blow which does not break the outer one, andowing to this brittleness it is called the vitreous, or glassy layer. GLABELLA, ANTERIOR NASAL;SPINE PROSTHIO. Fig. 19.—The Vertex and Side of the Skull.—(Gerrish.) Observing the illustrations, or better, with the skull in thehand, the student may trace the frontal, two parietal, and occipitalbones forming the vault of the skull, or the vertex; and at the sidesthe squamous and mastoid portions of the temporal bones and thetip of the great wing of the sphenoid. 26 ANATOMY AND PHYSIOLOGY FOR NURSES. Turning the skull upside down, observe the base. In themedian line at the back is the basal part of the occipital bone,with the foramen magnum and the condyles on either side ofit. In front of that are the &o(/;y and/»foce55e5 o///^e sphenoid, andthe roof of the mouth (or hard palate) bounded by the upper forward from the lateral part of the occipital bone is the
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