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Morphogenetic reorganization of the brain during embryogenesis in the grasshopper

Boyan, G. S. and Williams, J. L. and Reichert, H.. (1995) Morphogenetic reorganization of the brain during embryogenesis in the grasshopper. Journal of comparative neurology, Vol. 361, H. 3. pp. 429-440.

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Official URL: http://edoc.unibas.ch/dok/A5250965

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Abstract

We have studied the morphogenetic reorganization that occurs in the grasshopper brain during embryogenesis. We find that morphogenetic movements occur at three organizational levels during brain development. First, the entire developing brain changes its orientation with respect to the segmental chain of ventral ganglia. A 90 degrees shift in the attitude of the brain neuraxis occurs during embryogenesis due to a gradual upward movement of the cerebral structures in the head. Second, the clusters of proliferating neuroblasts and progeny that generate the neuroarchitecture of the mature brain move relative to one another and to nonneural structures such as the stomodeum. This is especially pronounced for the pars intercerebralis and for the tritocerebrum, as shown by annulin and engrailed immunoreactivity. Third, individual neuroblasts within a given proliferative cluster undergo positional reorganization during embryogenesis. Identified neuroblasts of the tritocerebrum and the pars intercerebralis are displaced within the brain. We conclude that the transformation of the simple sheet-like structure of the early embryonic brain into the highly differentiated structure of the mature brain involves a series of morphogenetic movements that occur in virtually all parts of the brain.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Molecular Zoology (Reichert)
UniBasel Contributors:Reichert, Heinrich
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Wiley-Liss
ISSN:0021-9967
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:19
Deposited On:22 Mar 2012 13:16

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