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Syncytial Theory
By: Adam R. Navis
| Published: Oct 30, 2007
The syncytial theory of neural development was proposed by Victor Hensen in 1864 to explain the growth and differentiation of the nervous system.…
Hensen, Victor, 1835-1924Nervous SystemNeurons
The Gradient Theory
By: Mary E. Sunderland
| Published: Aug 01, 2009
The gradient theory is recognized as Charles Manning Child's most significant scientific contribution. Gradients brought together Child's interest…
Regeneration
Charles Darwin's Theory of Pangenesis
By: Yawen Zou
| Published: Jul 20, 2014
In 1868 in England, Charles Darwin proposed his pangenesis theory to describe the units of inheritance between parents and offspring and the…
HeredityDarwin, Charles, 1809-1882ReproductionEvolutionNatural selection
The Formation of Reticular Theory
By: Isra Mishqat
| Published: Jun 19, 2017
In the nineteenth century, reticular theory aimed to describe the properties of neurons, the specialized cells which make up the nervous system, but…
Nerve TissueNervous SystemNobel Prize winnersBrainNeurons
The Germ-Plasm: a Theory of Heredity (1893), by August Weismann
By: Yawen Zou
| Published: Jan 26, 2015
Friedrich Leopold August Weismann published Das Keimplasma: eine Theorie der Vererbung (The Germ-Plasm: a Theory of Heredity, hereafter The Germ-…
LiteratureWeismann, August, 1834-1914. Keimplasma. EnglishGerm CellsHeredityInheritance of acquired characters
Categorization of Conservative, Semi-Conservative, and Dispersive DNA Replication Theories (1953–1956)
By: Victoria Hernandez
| Published: Oct 31, 2019
In 1956, Gunther Stent, a scientist at the University of California Berkeley in Berkeley, California, coined the terms conservative, semi-…
DNADNA ReplicationDNA HelicasesGenesHeredity
Amphioxus, and the Mosaic Theory of Development (1893), by Edmund Beecher Wilson
By: James Lowe
| Published: Mar 31, 2015
Edmund Beecher Wilson experimented with Amphioxus (Branchiostoma) embryos in 1892 to identify what caused their cells to differentiate into new types…
Wilson, Edmund B. (Edmund Beecher), 1856-1939AmphioxusEmbryosEmbryologyDevelopmental Biology
Early Infantile Autism and the Refrigerator Mother Theory (1943-1970)
By: Sean Cohmer
| Published: Aug 19, 2014
In 1943, child psychiatrist Leo Kanner in the US gave the first account of Early Infantile Autism that encouraged psychiatrists to investigate what…
ContextKanner, Leo, 1894-1981AutismAutism spectrum disordersAutism in children
A Treatise on the Theory and Practice of Midwifery, (1752-1764) by William Smellie
By: Yvette Tran
| Published: Jul 23, 2017
A Treatise on the Theory and Practice of Midwifery is a three volume collection of patient accounts that William Smellie published from 1752 to 1764…
MidwivesObstetrical ForcepsChildbirthObstetricsLabor (Obstetrics)
A Treatise on the Theory and Practice of Midwifery (1752-1764), by William Smellie
By: Yvette Tran
| Published: May 04, 2017
A Treatise on the Theory and Practice of Midwifery is a three volume collection of patient accounts that William Smellie published from 1752 to 1764…
LiteratureMidwivesObstetrical ForcepsChildbirthObstetrics