...alluded to. The factors in producing this thinning are rachitic softening of the bones and pressure; pressure of the brain from within and of the pillow from without. Consequently, the portions of the cranial arch in which the thinning occurs are the posterior and lateral,...

...dependent upon a previous thickening and consequent softening of the bone, are brought about by the pressure of the brain from within and of the pillow from without ; it is only thus that their occurrence upon the occiput can be explained, and when they take place...