A system of obstetrics . Fig. 93.—Brain of Four Months Human Embryo, natural size (from Kolliker): pr, pyramids;p, pons; cr, crus cerebri; o, floor of third ventricle in region of optic chiasma; a, temporallobe ; ol, olfactory lobe ; sp, septum lucidum ; c, corpus callosum; po, occipito-parietal sul-cus ; r, pineal gland: m, mid-brain; cc, cerebellum. Fig. 94.—Brain of Six Months Human Embryo, natural size (from Kolliker): ol, olfactory lobe ;fs, fissure of Sylvius ; c, cerebellum ; p, pons Varolii; /, flocculus; o, olivary body. appear to be due to a more rapid growth for a time of the cerebr
A system of obstetrics . Fig. 93.—Brain of Four Months Human Embryo, natural size (from Kolliker): pr, pyramids;p, pons; cr, crus cerebri; o, floor of third ventricle in region of optic chiasma; a, temporallobe ; ol, olfactory lobe ; sp, septum lucidum ; c, corpus callosum; po, occipito-parietal sul-cus ; r, pineal gland: m, mid-brain; cc, cerebellum. Fig. 94.—Brain of Six Months Human Embryo, natural size (from Kolliker): ol, olfactory lobe ;fs, fissure of Sylvius ; c, cerebellum ; p, pons Varolii; /, flocculus; o, olivary body. appear to be due to a more rapid growth for a time of the cerebralhemispheres than of the cranial cavity, so that the former have tobecome folded in order to gain room. Certain of these primary fissures are, however, permanent—namely,the sulcus hippocampus ; the sulcus parieto-occipitalis (Fig. 93, po); thesulcus calcarinus (Fig. 92, fc); the infolding (p. 160) of the ependymato cover the choroid plexuses. The Sylvian fissure may perhaps beclassed with the permanent primary fis
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
