[Atlas of the stages of development of the external forms of the brain in the human embryo].

The various external features of the developing human brain during the embryonic period proper (up to 8 postovulatory weeks) are illustrated as they appear in reconstructions made from embryos of Carnegie stages 8 to 23. This is the first systematic, stage-by-stage account. The appearances are compared with those that can be seen in intact embryos of corresponding stages up to 7 postovulatory weeks. The brain of an early fetus (9 postovulatory weeks) is also included. The medial views will be treated in a subsequent article.