File:Stage16 embryo and brain 01.jpg

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Human Embryo Carnegie Stage16 and Neural Tube Model

The embryo and how the brain and spinal cord appears during week 6 after fertilisation (Gestational Age - GA week 8). The associated detailed description below is not part of the K12 presentation.


  • Left - surface view of a human embryo Week 6.
  • Right - model of neural tube surface appearance at this time and viewed also from the same direction. Note the overall shape and relative sizes of different brain regions. The neural tube is still a thin-walled tube and is mainly a fluid-filled sac. The model triangular pale region corresponds to the similar shaped dark region on the embryo. This is the very thin-walled region of the fourth (4th) ventricle.


Brain and Neural Tube Links: K12 Brain Awareness Week | Week 5 | Week 6 | Week 8 | Neural Development


Gestational Age - is the clinical staging term of human development measured from the last menstrual period (indicating when the mother was not pregnant) not from fertilisation (about the time of ovulation of the next cycle).

Stage 16 Links: Week 6 | Head | Lecture - Limb | Lecture - Gastrointestinal | Lecture - Head Development | Science Practical - Gastrointestinal | Science Practical - Head | Carnegie Embryos | Category:Carnegie Stage 16 | Week 6 | Next Stage 17
  Historic Papers: 1906 | 1908 | 1948 stages 15-18


Week: 1 2 3 4 5 6 7 8
Carnegie stage: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23



Cite this page: Hill, M.A. (2024, May 30) Embryology Stage16 embryo and brain 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage16_embryo_and_brain_01.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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