Embryology History - John Saunders

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Introduction

This text from a recent review of John Saunders research.[1]

"John Saunders was a highly skilled embryologist who pioneered the study of limb development. His studies on chick embryos provided the fundamental framework for understanding how vertebrate limbs develop. This framework inspired generations of scientists and formed the bridge from experimental embryology to molecular mechanisms. Saunders investigated how feathers become organized into tracts in the skin of the chick wing and also identified regions of programmed cell death. He discovered that a region of thickened ectoderm that rims the chick wing bud - the apical ectodermal ridge - is required for outgrowth and the laying down of structures along the proximo-distal axis (long axis) of the wing, identified the zone of polarizing activity (ZPA; polarizing region) that controls development across the anteroposterior axis ("thumb to little finger "axis) and contributed to uncovering the importance of the ectoderm in development of structures along the dorso-ventral axis ( "back of hand to palm" axis). This review looks in depth at some of his original papers and traces how he made the crucial findings about how limbs develop, considering these findings both in the context of contemporary knowledge at the time and also in terms of their immediate impact on the field."
Limb Links: limb | limb axis | appendicular skeleton | Limb Rotation Timetable | Upper limb ossification | Lower limb ossification | Mouse limb | SHH | FGF | BMP | WNT | limb abnormalities | ICD-11 limb anomalies | Category:Limb
Historic Limb Embryology  
1901 Limb Development | 1902 Limbs | 1905 Rabbit Limb Veins | 1906 Hand papillary ridges | 1906 Digit Abnormalities | 1908 Two Subclavian Arteries | 1910 Limb Muscles | 1910 Upper Limb Bursae | 1915 Femur Epiphysis | 1919 Lower Limb Arteries | 1922 Pig Limb Vasculature | 1924 Rare Malformations | 1932 Postnatal Foot Growth | 1948 Chick Wing | 1968 Knee Development | 1990 Upper Limb Innervation


Embryologists: William Hunter | Wilhelm Roux | Caspar Wolff | Wilhelm His | Oscar Hertwig | Julius Kollmann | Hans Spemann | Francis Balfour | Charles Minot | Ambrosius Hubrecht | Charles Bardeen | Franz Keibel | Franklin Mall | Florence Sabin | George Streeter | George Corner | James Hill | Jan Florian | Thomas Bryce | Thomas Morgan | Ernest Frazer | Francisco Orts-Llorca | José Doménech Mateu | Frederic Lewis | Arthur Meyer | Robert Meyer | Erich Blechschmidt | Klaus Hinrichsen | Hideo Nishimura | Arthur Hertig | John Rock | Viktor Hamburger | Mary Lyon | Nicole Le Douarin | Robert Winston | Fabiola Müller | Ronan O'Rahilly | Robert Edwards | John Gurdon | Shinya Yamanaka | Embryology History | Category:People
Related Histology Researchers  
Santiago Ramón y Cajal | Camillo Golgi

References

  1. <pubmed>28625869</pubmed>

External Links

External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name. Links to any external commercial sites are provided for information purposes only and should never be considered an endorsement. UNSW Embryology is provided as an educational resource with no clinical information or commercial affiliation.



Cite this page: Hill, M.A. (2020, April 9) Embryology Embryology History - John Saunders. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Embryology_History_-_John_Saunders

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© Dr Mark Hill 2020, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G