. The brain as an organ of mind. obes takes place at a slowerrate, and the previously absent median lobe not only beginsto appear but also becomesmarked on the surface bythree or four transverse lateral lobes are stillperfectly smooth—though by Fig upper surface of the ^j OUd of the sixth mOUthFoetal Braui at Six Months, (febarpey, after R. Wagner.) Letters of refereuce they alsO liaVO acquircd UU- as in last figure. ^ merous transverse pons Varolii, as already intimated, undergoes adevelopment correlative with that of the lateral lobes ofthe Cerebellum. In the
. The brain as an organ of mind. obes takes place at a slowerrate, and the previously absent median lobe not only beginsto appear but also becomesmarked on the surface bythree or four transverse lateral lobes are stillperfectly smooth—though by Fig upper surface of the ^j OUd of the sixth mOUthFoetal Braui at Six Months, (febarpey, after R. Wagner.) Letters of refereuce they alsO liaVO acquircd UU- as in last figure. ^ merous transverse pons Varolii, as already intimated, undergoes adevelopment correlative with that of the lateral lobes ofthe Cerebellum. In the remaining important section of intrauterine life,from the 6th to the end of the 9th month, the develop-mental changes in the Cerebrum are much more markedthan they are in the Cerebellum. The walls of the CerebralHemispheres become thicker, and there is a proportionatediminution in the capacity of the lateral ventricles, thethree horns of which now become quite distinct. TheCorpus Cailosum assumes a more horizontal direction,. Chap. XIX.] DURING UTERINE LIFE. 343
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