The role of the rhombic lip in avian cerebellum development - PubMed (original) (raw)
. 1999 Oct;126(20):4395-404.
doi: 10.1242/dev.126.20.4395.
Affiliations
- PMID: 10498676
- DOI: 10.1242/dev.126.20.4395
The role of the rhombic lip in avian cerebellum development
R J Wingate et al. Development. 1999 Oct.
Abstract
We have used a combination of quail-chick fate-mapping techniques and dye labelling to investigate the development of the avian cerebellum. Using Hoxa2 as a guide for the microsurgical construction of quail-chick chimaeras, we show that the caudal boundary of the presumptive cerebellum at E6 maps to the caudal boundary of rhombomere 1. By fate mapping the dorsoventral axis of rhombomere 1, we demonstrate that granule cell precursors are generated at the rhombic lip together with neurons of the lateral pontine nucleus. DiI-labelling of cerebellum explants reveals that external germinal layer precursors have a characteristic unipolar morphology and undergo an orientated, active migration away from the rhombic lip, which is apparently independent of either glial or axon guidance or 'chain' formation.
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