ABSTRACT
The earliest cell migration starts in the ventral part of the neural tube, especially around the plica encephali ventralis.
A survey is given of the processes of successive migrations in different parts of the embryonic brain in different species. The first appearance of the second migration layer is in different parts of the brain in Torpedo and chick, possibly correlated with the differing functional importance of the parts in the two species.
Experiments show that the formation of a second migration layer in the thalamus of chick embryos is not dependent on the presence of surrounding brain parts.
Copyright © 1956 by Company of Biologists
1956
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