. The anatomy of the human body. Human anatomy; Anatomy. Fig'. 22. periods of life, and the internal surface of the sagittal suture^ It receives the superior longi- tudinal sinus in its entire extent, and contains the internal orifices of the parietal foramina. On each side are the frontal fossae, correspond- ing to the protuberances of the same name, and the internal surface of the fronto-parietal (coronal) suture (b c, fig. 22); the encephahc surface of the parietal bone {h dfc), and the parietal fossa ; the lambdoid suture {df), and the superior occipital fossa. We may remark that the fosse
. The anatomy of the human body. Human anatomy; Anatomy. Fig'. 22. periods of life, and the internal surface of the sagittal suture^ It receives the superior longi- tudinal sinus in its entire extent, and contains the internal orifices of the parietal foramina. On each side are the frontal fossae, correspond- ing to the protuberances of the same name, and the internal surface of the fronto-parietal (coronal) suture (b c, fig. 22); the encephahc surface of the parietal bone {h dfc), and the parietal fossa ; the lambdoid suture {df), and the superior occipital fossa. We may remark that the fosses, are deeper than would seem to be indicated by the external prominences, be- cause they are partly formed at the expense of the bone itself; and that the sutures are less deeply denticulated on their internal than on their external aspect. Lastly, the whole internal surface of the vault of the cranium, but especially that of the parietal bones, is traversed by ramified grooves (A i\ partly for veins, partly for ar- teries ; the venous grooves, which are not; perceptible in all subjects, but which are very large in some, are distinguished from the arterial, as M. Breschet has pointed out, by their being perforated by numerous foramina. The hase of the cranmm {fig. 23), presents three series of fossae, or three regions, ar- ranged, as it were, in steps upon an inclined plane, from before backward, and from above downward. They are described as the anterior, middle, and posterior regions. Anterior or ethmoido-frontal region. In this region we observe, in the middle, the eth- „„ moidal fossa, in which is the foramen caecum; the *^ crista galli (a); the ethmoidal grooves, and the for- amina with which they are perforated ; the ethmoi- dal fissure, for the ethmoidal or nasal branch of the ophthalmic nerve ; the ethmoido-frontal sutures, run- ning from before backward ; the orifices of the inter- nal orbitary foramina; and the trace of the ethmo-sphe- noidal suture, running tran
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