. Manual of antenatal pathology and hygiene : the foetus. Fig. 16. 102 ANTENATAL PATHOLOGY AND HYGIENE extent in the fcetus, but my sections do not show this peculiarity (Figs. 17 and 18). The cerebralconvolutions areless complex inthe foetus than inthe adult, and thesulci are less may be thatsome accessoryfissures are notdeveloped tillafter birth, andare thereforepostnatal forma-tions, but aboutthis matter thereis little know-ledge. The studyof the minuteanatomy of thefoetal brain hasrecently receiveda great impulseby the discoveryof Flechsig thatthere is a correla-tion between thefun
. Manual of antenatal pathology and hygiene : the foetus. Fig. 16. 102 ANTENATAL PATHOLOGY AND HYGIENE extent in the fcetus, but my sections do not show this peculiarity (Figs. 17 and 18). The cerebralconvolutions areless complex inthe foetus than inthe adult, and thesulci are less may be thatsome accessoryfissures are notdeveloped tillafter birth, andare thereforepostnatal forma-tions, but aboutthis matter thereis little know-ledge. The studyof the minuteanatomy of thefoetal brain hasrecently receiveda great impulseby the discoveryof Flechsig thatthere is a correla-tion between thefunctions of sys-tems of neuronesand the myelina-tion of theiraxons: in the full-time fcetus, thewhole afferenttract conveyingtactile, articular,muscular, andvisceral sensa-tions by the pos-terior columns,fillet, thalamus,and corona radi-ata is myelinated;and it follows, ifthe hypothesis ofFlechsig be cor-rect, that impres-sions have, duringbeen passing along. Fig. 17.—Mesial sagittal section of fcetus. In the upper part ofthe region of the head the section has passed slightly to theright of the middle line, leaving the falx cerebri , Anterior fontanelle ; &, presphenoid ; c, thyroid cartilageof larynx ; d, tongue ; e, left innominate vein ; /, thymusgland ; g, tricuspid opening in the lieart; h, the liver ; i,the pylorus ; h, transverse colon ; I, the pancreas ; to, lobusspigelii of liver ; n, first lumbar vertebra ; o, left auricle ;j7, aorta; r, trachea; s, seventh cervical vertebra ; t, thepharynx; v, cerebellum ; w, posterior fontanelle. the last three or four months of intrauterine life, REGION OF THE FACE 101 these bundles of fibres to the receptive centres in the cortex, Eolandicarea. From these observations much hght may be expected to bethrown upon thephysiology of the foetalbrain {;vide W. Digest ofpapers by Mechsig,Dollken, and Nissl, inJourn. Ment. Sc, Janu-ary 1899). The small size ofthe face of the
Size: 1161px × 2153px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfetus, bookyear1902
