. A text-book of embryology for students of medicine [electronic resource]. Embryology; Embryology. THE HIND-BRAIN VESICLE OR METENCEPHALON. 293 The lateral parts of the primary ridge increase in size and eventually, in the human brain, outstrip the median lobe in growth. They acquire their chief transverse fissures in the fourth or fifth month, and the smaller sulci later. The thickened cerebellar ridge on the roof of the hind- brain vesicle being continuous with the lateral walls, the continuity of the cerebellar hemispheres with the pons through the middle and superior cerebellar peduncles
![. A text-book of embryology for students of medicine [electronic resource]. Embryology; Embryology. THE HIND-BRAIN VESICLE OR METENCEPHALON. 293 The lateral parts of the primary ridge increase in size and eventually, in the human brain, outstrip the median lobe in growth. They acquire their chief transverse fissures in the fourth or fifth month, and the smaller sulci later. The thickened cerebellar ridge on the roof of the hind- brain vesicle being continuous with the lateral walls, the continuity of the cerebellar hemispheres with the pons through the middle and superior cerebellar peduncles Stock Photo](https://c8.alamy.com/comp/RJNB3A/a-text-book-of-embryology-for-students-of-medicine-electronic-resource-embryology-embryology-the-hind-brain-vesicle-or-metencephalon-293-the-lateral-parts-of-the-primary-ridge-increase-in-size-and-eventually-in-the-human-brain-outstrip-the-median-lobe-in-growth-they-acquire-their-chief-transverse-fissures-in-the-fourth-or-fifth-month-and-the-smaller-sulci-later-the-thickened-cerebellar-ridge-on-the-roof-of-the-hind-brain-vesicle-being-continuous-with-the-lateral-walls-the-continuity-of-the-cerebellar-hemispheres-with-the-pons-through-the-middle-and-superior-cerebellar-peduncles-RJNB3A.jpg)
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. A text-book of embryology for students of medicine [electronic resource]. Embryology; Embryology. THE HIND-BRAIN VESICLE OR METENCEPHALON. 293 The lateral parts of the primary ridge increase in size and eventually, in the human brain, outstrip the median lobe in growth. They acquire their chief transverse fissures in the fourth or fifth month, and the smaller sulci later. The thickened cerebellar ridge on the roof of the hind- brain vesicle being continuous with the lateral walls, the continuity of the cerebellar hemispheres with the pons through the middle and superior cerebellar peduncles and with the medulla by means of the inferior peduncles, is easily A ib mb is hb IVv. Fig. 147.—Brains of human embryos, from reconstructions by His: A, brain from fifteen-day embryo; B, from three-and-a-half-week embryo; C, from seven- and-a-half-week fetus: fb, ib, mb, hb, ab, fore-, inter-, mid-, hind-, and after-brain vesicles ; o, optic vesicle; ov, otic vesicle ; in, infundibulum ; m, mammillary proc- ess; pf, pontine flexure; IVv, fourth ventricle; nk, cervical flexure; ol, olfactory lobe; b, basilar artery ; p, pituitary recess. understood. These bands of fibers become evident, the in- ferior in the third month, the middle in the fourth month, and the superior in the fifth month. While the posterior part of the roof of the hind-brain. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Heisler, John Clement; Waterstone, David, former owner; Duke-Elder, Stewart, 1898-1978, former owner; University College, London. Library Services. Philadelphia : W. B. Saunders Company