Identifier: 39002086343333.med.yale.edu
Title: A treatise on mental diseases
Year: 1900 (1900s)
Authors: Berkley, Henry Johns,1860-
Subjects: Insanity Mental Disorders
Publisher: New York, D. Appleton & Company
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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the microcephalic idiot. Other idiotic microcephalic individuals present asymmetries ofthe cranial bones in a minor or major degree. These result fromearly synostoses, as well as from local or general hypertrophies ofthe bones, instances of the latter type being rare. The wedge,tower, quadrangular, and keel-shaped heads are frequent in thissub-class. The generic type of skull may also vary greatly. Themajority of idiots of this sub-group have crania of the dolicho-cephalic type, while in a smaller number meso-brachycephalic andbrachycephalic skulls are seen. The orbits, facial bones, palate,and extremities also present deformities, those of the facies usu-ally being limited to the upper and lower maxillae. The most fre-quent of these are the palatal anomalies, the high-arched and flatpalates (see Plate VI, etc.). Little bony projections along the lineof the central suture are frequent, together with irregular eleva-tions of the borders of the median suture (torus palatinus). The &
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IDIOCY AND IMBECILITY—CONGENITAL AND ACQUIRED 5Q1 teeth may also be uneven or deficient. Next in frequency areabnormalities in the development of the external portions of theauditory apparatus, the helix, tragus, anti-helix, or lobe being de-formed ; or the whole ear may be too large or too small. Commonsensation is not usually disturbed to any considerable degree, though

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