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O3. Secondary neurulation: Another type of neurulation by mesenchymal-to-epithelial transition
Differentiation, 2010Two different types of neurulation processes take place during early embryogenesis. One is a well known neurulation where a sheet of epithelial cells folds inward to form a tubular structure (primary neurulation). Another one, called secondary neurulation (SN), is seen in a posterior region of the body.
Yoshiko Takahashi, Eisuke Shimokita
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Evidence that secondary neurulation occurs autonomously in the chick embryo
Journal of Experimental Zoology, 1982AbstractOther investigations have demonstrated that pressure, exerted by fluid contained within the lumen of the closed neural tube, plays an important role in the morphogenesis of cranial regions of chick embryos. In this study, we investigated whether this pressure is involved also in the formation of the secondary portion of the neural tube‐the ...
R, Costanzo +2 more
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Midkine and secondary neurulation
Teratology, 1997Midkine (MK) is a growth factor with documented neurotrophic activity for central nervous system neurons. It has also been shown to induce conversion of pluripotent mesenchymal P19 embryonic carcinoma cells into neuroepithelial derivatives. During the development of the chick embryonic neuraxis, two separate events occur.
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Retained Medullary Cord in Humans: Late Arrest of Secondary Neurulation
Neurosurgery, 2011Formation of the caudal spinal cord in vertebrates is by secondary neurulation, which begins with mesenchyme-epithelium transformation within a pluripotential blastema called the tail bud or caudal cell mass, from thence initiating an event sequence proceeding from the condensation of mesenchyme into a solid medullary cord, intrachordal lumen formation,
Dachling, Pang +2 more
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Secondary Neurulation Defects-1: Thickened Filum Terminale, Retained Medullary Cord
2017Dachling Pang +2 more
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Child's Nervous System, 2013
The morphological changes and expression patterns of neuronal antigens of human embryos, obtained from the therapeutic termination of pregnancy or from surgical procedures, were analyzed in order to characterize the secondary neurulation.A total of 21 human embryos from Carnegie stages 12 to 23 and two fetuses in early stages were studied.
Hee-Jin, Yang +8 more
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The morphological changes and expression patterns of neuronal antigens of human embryos, obtained from the therapeutic termination of pregnancy or from surgical procedures, were analyzed in order to characterize the secondary neurulation.A total of 21 human embryos from Carnegie stages 12 to 23 and two fetuses in early stages were studied.
Hee-Jin, Yang +8 more
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Distribution of cell surface glycoconjugates during secondary neurulation in the chick embryo
The Anatomical Record, 1990AbstractLectin histochemistry was used to examine the expression of cell surface glycoconjugates during secondary neurulation in chick embryos. Fourteen lectins were applied to serial sections of the caudal region of embryos at the various stages of tail bud development.
C M, Griffith, M J, Wiley
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Histological and ultrastructural studies of secondary neurulation in mouse embryos
American Journal of Anatomy, 1984AbstractThe histological and ultrastructural features of secondary neurulation in C57BL/6 mouse embryos were examined as a first step in the analysis of how this process occurs in mammalian embryos. Secondary neurulation involves two major events in mouse embryos: (1) formation of the medullary rosette (9.5‐ to 10‐day embryos) or plate (11‐ to 12‐day ...
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The Anatomical Record, 1987
AbstractCell elongation is a cardinal event in formation and shaping of the neuroepithelium during both primary and secondary neurulation. This study had three purposes. The first was to clarify the role of microtubules in maintaining the elongated configurations of chick neuroepithelial cells. Neuroepithelial cells of the neural plate (the rudiment of
G C, Schoenwolf, M L, Powers
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AbstractCell elongation is a cardinal event in formation and shaping of the neuroepithelium during both primary and secondary neurulation. This study had three purposes. The first was to clarify the role of microtubules in maintaining the elongated configurations of chick neuroepithelial cells. Neuroepithelial cells of the neural plate (the rudiment of
G C, Schoenwolf, M L, Powers
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Anatomy and Embryology, 1987
Twenty-four embryos of stage 12 (26 days) were studied in detail and graphic reconstructions of five of them were prepared. The characteristic features of this stage are 21-29 pairs of somites, incipient or complete closure of the caudal neuropore, and the appearance of upper limb buds.
F, Müller, R, O'Rahilly
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Twenty-four embryos of stage 12 (26 days) were studied in detail and graphic reconstructions of five of them were prepared. The characteristic features of this stage are 21-29 pairs of somites, incipient or complete closure of the caudal neuropore, and the appearance of upper limb buds.
F, Müller, R, O'Rahilly
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