Human anatomy, including structure and development and practical considerations . ^. 911;; altera shorttime when viewed from l)ehitul it presents an elongated lozen^^e-shaped form and,hence, is also calKtl the rhombencephalon. ihe middle vesicle, the mid-brain^or mesencephalon, is cons]ncuous on account of its rounded form and pnnninentposition, lying, as it does, over the marked primary flexure which the head-end ofthe neural tube very early exhibits. The anterior vesicle, known as the fore-brain, or prosencephalon, at lirst issmall and rounded, but soon becomes modified by the appearance, on
Human anatomy, including structure and development and practical considerations . ^. 911;; altera shorttime when viewed from l)ehitul it presents an elongated lozen^^e-shaped form and,hence, is also calKtl the rhombencephalon. ihe middle vesicle, the mid-brain^or mesencephalon, is cons]ncuous on account of its rounded form and pnnninentposition, lying, as it does, over the marked primary flexure which the head-end ofthe neural tube very early exhibits. The anterior vesicle, known as the fore-brain, or prosencephalon, at lirst issmall and rounded, but soon becomes modified by the appearance, on either side,of a hollow protuberance, the optic vesicle, that pushes out from the lower lateralwall. Por a time the optic vesicle communicates with the main ca\ity of the fore-brain by a wide opening. This gradually becomes reduced and constricted until the Fore-brain allium Mid-brain Optic vesicle. Fig. 911. Fore-brain(thalamic region > Pallium Mid-brain Hind-brain
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
