File:Wen1928-Fig10.jpg

Fig. 10. A graph of the neural crest of the 17-somite embryo H951

Showing the relation of the number of crest cells to somite levels. The position of the somites was plotted on millimeter paper and then the number of crest cells in each section was counted with an immersion lens and plotted in appropriate position. The stippled area accordingly indicates only the number of crest cells, not their peripheral spread.

4. Spinal neural crest. For the sake of convenience in dealing with the neural crest of the 17—somite embryo caudal to rh. 7, we have arbitrarily included the crest element rostral to the third pair of somites in the spinal region, although anything in front of that level is to be regarded as belonging to the occipital region of the head. Histologically, only a few crest cells can be identified immediately caudal to the vagal neural crest. Definite crest swarms cannot be recognized until the upper border of the 1st somite is reached, whence they can be followed caudally as far as the intersegmental space of the 11th to 12th somites on the left and the cranial border of the 13th somite on the right side of the embryo. Beyond this point no crest cell can be found (fig. 10).

Historic Disclaimer - information about historic embryology pages

Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Links: fig 1 | Plate 2 | fig 2 | fig 3 | fig 4 | fig 5 | fig 6 | fig 7 | fig 8 | fig 9 | fig 10 | fig 11 | fig 12 | fig 13 | fig 14 | fig 15 | fig 16 | fig 17 | fig 18 | fig 19 | fig 21 | fig 21 | fig 22 | fig 23 | fig 24 | fig 25 | fig 26 | fig 27 | fig 28 | fig 29 | Wen 1928 | Carnegie stage 11 | Carnegie stage 12 | Historic Papers

Reference

Wen IC. The anatomy of human embryos with seventeen to twenty-three pairs of somites (1928) J. Comp. Neural., 45: 301-376.

Cite this page: Hill, M.A. (2024, April 25) Embryology Wen1928-Fig10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Wen1928-Fig10.jpg

What Links Here?

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