Paper - The Huber six-somite human embryo (M 71)

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Anson BJ. Cauldwell EW. and Pick JW. The Huber six-somite human embryo (M 71). (1943) 59th Meeting American Association of Anatomists.

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Note this historic abstract was published in 1943 describing a Carnegie stage 10 human embryo Humber (M71).

Carnegie stage 10 - Week 4, 22 - 23 days, Gestational Age GA week 6, 2 - 3.5 mm, Somite number 4 - 12.

By this same author:

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Modern Notes:

Stage 10 Links: Week 4 | Gastrulation | Lecture | Practical | Image Gallery | Carnegie Embryos | Embryos | Category:Carnegie Stage 10 | Next Stage 11
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Pages where the terms "Historic Textbook" and "Historic Embryology" 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 and interpretations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

The Huber six-somite human embryo (M 71)

Barry J. Anson, Earl W. Cauldwell and James W. Pick

Department of Anatomy, Northwestern University Medical School.

Fifty-ninth annual meeting of the American Association of Anatomists which was to have been held at McGill University, Montreal, has been postponed. This abstract was submitted.


This specimen is important because it will fill a gap in the published descriptions of human embryos. Only the fragmentary description of Klb (5-6 somites) exists between the 4-somite specimens of Bartelmez, Sternberg and Orts Llorca and the 7-somite specimen of Payne.


Detailed studies have been carried out on M71 and extended comparisons with all published specimens between 4 and 8 somites have been made. In most respects M71 occupies the position in the series one would expect. Among its anatomical features (and the conclusions drawn from them) the most notable are the following: It is the oldest described specimen that still presents a chordal canal in the rostral end of the head process. It is the youngest in which the rostral neural crest has been identified. It is the earliest to show an indication of the spinal neural crest.


The heart should occupy the position in the Davis series now accorded by him to Klb, whereas the latter, perhaps, Bad better be dropped from any series depicting normal cardiac development. The level of closure of the neural folds is normally variable and a marked midbody flexure is not necessarily associated with irregularities in closure. It is more probable, rather, that the position and extent of neural tube closure, which resists flexing, influences the site of angulation.



Cite this page: Hill, M.A. (2019, April 18) Embryology Paper - The Huber six-somite human embryo (M 71). Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_The_Huber_six-somite_human_embryo_(M_71)

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