Atlas and epitome of diseases of children / by R. Hecker and J. Trumpp ; edited by Isaac A. Abt.

  • Rudolf Hecker
Date:
1907
Catalogue details

Licence: In copyright

Credit: Atlas and epitome of diseases of children / by R. Hecker and J. Trumpp ; edited by Isaac A. Abt. Source: Wellcome Collection.

    40/586 (page 28)
    14 per cent. of the body weight, in eontradistinction to 2.7 per cent. in adults. It grows very rapidly during the first year, at the cnd of wliich time it reaches one- lialf of its permanent weight. The convolutions are but slightly differentiated and there are but few medullated nerve-fibcrs. The psychomotor subcortical inhibitory centers are but slightly excitable, as are also the per- ipheral sensory and motor nerves during the first six weeks (Soltmann, Westphal). The musculature is relaxed, pale, watery, and is readily fatigued. The adipöse tissue is present in large amounts. In the eheeks, where it possesses distinct anatomic boundaries, it forms a cushion of fat, and is of assistance in the aet of sucking (von Ranke). When the baby begins to walk about he loses much of this fat; tliat of the cheek is the last to disappear. Female Genitals.—These are not closed. The labia minora, hymen, and urethra are visible, and therefore the infant is predisposed to Vulvovaginitis and cystitis. PHYSIOLOGIC PECULIARITIES GROWTH IN LENGTH The average length of a newborn infant is 50 cm. 20 in.], in boys 51 cm. [20.2 in.] and in girls 49 cm. '19.8 in.]. The length of the body at various ages, according to E. von Lange, is as follows : Age in) months j Body 1 length V (cm.) ) [Body 1 length y (in-)] ) Birth. I. 11. III. IV. V. VI. VII. VIII. IX. X. XI. XII. 49.5 55.2 58.5 61.0 63.0 64.7 66.2 67.5 68.8 69.9 71.0 72.0 73.0 19.8 22.0 23.4 24.4 25.2 25.8 26.4 27.0 27.5 27.9 £ oc 8 29.4 The increase in the length of the body is practically the samc for both boys and girls during the first two years, but from then until the thirteenth year the female child grows more slowly. After the thirteenth year,