. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 34 OF THE HEAD IN GENERAL. these there are two smaller fontanels on either side; one is in the angle of the temporal, parietal, and occipital bones, and the other is at the junction of the temporal, parietal, and sphenoid bones. Ossa Wo?'?7iiana or Triquetra, are small, irregular in shape and number, sometimes found in the sutures, particularly about the middle of the lambdoidal. They have a distinct point of ossific
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. 34 OF THE HEAD IN GENERAL. these there are two smaller fontanels on either side; one is in the angle of the temporal, parietal, and occipital bones, and the other is at the junction of the temporal, parietal, and sphenoid bones. Ossa Wo?'?7iiana or Triquetra, are small, irregular in shape and number, sometimes found in the sutures, particularly about the middle of the lambdoidal. They have a distinct point of ossification. The dij^loe is the cellular bony structure between the external and internal or vitreous tables; it is traversed by channels lined by a venous lining which empty into the emissaries of Santorini. The cavity of the cranium is about six and a half inches in length, five in breadth and five in height. When the calvaria or arch of the cranium is removed, three deep fossa3 are ob- served at the base on each side. The anterior is formed by the frontal, sphenoid and ethmoid bones, and contains the anterior lobes of the brain; the middle, formed by the sphenoid and temporal bones, lodges the middle lobe; the posterior, formed by the occipital and temporal bones, is for the cerebellum. Orbital cavity.—Is formed on each side by seven bones repre- sented in this manner: Frontal Sphenoid (lesser wing). Malar. Sphenoid (greater wing).. Lachrymal. Ethmoid (os planum). Sphenoid (body). Malar. Superior maxillary. Palate. The cavity is conical, the apex being formed by the optic foramen, the base looks outwards and is somewhat quadrangular. The sphe- noidal foramen or fissure opens into the orbit, and is also called /b/'a- nien lacerum superiiis ; a slit or fissure between the sphenoid and maxillary bones being the foramen, lacerum inferius. Besides these there are other openings into the orbit already mentioned in the de- scription of each bone. Nasal Cavity.—This is an irregular ca
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