A STUDY OF DEVELOPMENTAL CRANIO ***CEREBRAL TOPOGRAPHY AS DETERMINED BY THE ORTHOSCOPIC METHOD

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Abstract
Study by Scammon''s method of 10 human subjects ranging from a 7-mo. fetus to 2 adults indicated that the silhouette area of the cerebrum expands very rapidly during the last mos. of fetal life and the first 8 mos. of postnatal life with very little change in this area after the 5th yr. The superior Rolandic-coronal distance increased with age though not to the extent described by others; the inferior increased more than the superior, which agrees approximately with the findings of others. The inferior end of the central sulcus, and also the lateral fissure, was closer to the squamous suture at maturity than at birth, with distances approximately the same as those given by others for the various ages. The changed relations of these 2 structures were found to be due to a rise of both suture and fissure, the change in position of the former being greater than that of the latter. The silhouette area of the lateral ventricle increased very little during the period of growth studied: its posterior and lateral horns extended farther posteriorly, but the anterior horn remained approximately stationary in the horizontal plane.

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