Dr. Jacobi's Works Volume 5; Collected Essays, Addresses, Scientific Papers and Miscellaneous Writings of A. Jacobi - Softcover

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1909 Excerpt: ... THE ETIOLOGICAL AND PROGNOSTIC IM-PORTANCE OF THE PREMATURE CLOSURE OF THE FONTANELS AND SUTURES OF THE IN-FANTILE CRANIUM The development of the various organs of the infantile body generally proceeds in an equable measure. Only the skull, with its contents, seems sometimes to form an exception to this rule. Compared with the whole body, the infantile head is large; its blood vessels are in due proportion to its size, and before the closure of the sutures, the blood vessels of the brain and of its membranes, finding less resistance from outside pressure, are expansible in a higher degree than are those in other parts of the body. In consequence, then, of increased upward motion of the blood, we find that in children the development of the skull, jaws, and teeth, and the frequency of inflammatory and exudatory diseases of the brain and its membranes, go hand in hand; they are co-ordinate effects of the same cause. The bones of the infantile body develop themselves with the same equability as its other parts. Protracted teething, retardation of the closure of the fontanels, retardation of walking, usually co-exist, and are not at all favorable symptoms, being too frequently the first signs of rachitis. Nor is prematurity of teething, of closure of the fontanels, and of walking, very rare. One fact, however, must not be overlooked here, viz., that the head and upper extremities, in their normal state, contain more lime, proportionately, than the pelvis and lower extremities. This fact is well understood, and explains the pathological alterations as well in the lower extremities as in the cranium, morbid tendencies going to develop mollification in the former, sclerosis in the latter. Indeed, all the cases of genuine sclerosis of the cranium, that have been re...

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