Neural development
Diagram[edit]
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Human Cortical Development. Gyrification, gyration/sulcation, cortical folding, cortical convolution, fissuration or fissurization.
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Slices through the brain at the mid-ventricular level and at the level of the centrum semiovale from six of the eight MR images obtained between 26 and 39 week gestational age
Timeline in human[edit]
3 weeks[edit]
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Human embryo between eighteen and twenty-one days old.
4 weeks[edit]
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Brain of a four-week old human embryo.
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Section of medulla spinalis of a four weeks’ embryo.
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Exterior of brain of human embryo of four and a half weeks.
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Brain of human embryo of four and a half weeks, showing interior of fore-brain.
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Human embryo from thirty-one to thirty-four days.
5 weeks[edit]
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Exterior of brain of human embryo of five weeks.
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Interior of brain of human embryo of five weeks.
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Human Embryo (7th week of pregnancy, 5th week p.o.)
6 weeks[edit]
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Diagram of the various parts of the brain of a six-week old embryo.
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A diagram showing the brain and major nerves of a 6 week old human fetus.
7 weeks[edit]
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9-Week Human Embryo from Ectopic Pregnancy (7th week p.o.)
3 months[edit]
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Hind-brain of a human embryo of three months—viewed from behind and partly from left side.
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Median sagittal section of brain of human embryo of three months.
4 months[edit]
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Inferior surface of brain of embryo at beginning of fourth month.
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Median sagittal section of brain of human embryo of four months.
5 months[edit]
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Outer surface of cerebral hemisphere of human embryo of about five months.
