Neocortical Evolution: Neuronal Circuits Arise Independently of Lamination

The evolutionary origin of the six-layered mammalian neocortex has been controversial. New data on genes with layer-specific expression in mammalian cortex have found an expression pattern in avian forebrain neurons consistent with the view that ‘cortical’ cells and circuits are present in all amnio...

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Bibliographic Details
Published in:Current biology 2013-01, Vol.23 (1), p.R12-R15
Main Author: Karten, Harvey J.
Format: Article
Language:English
Subjects:
Amniota
Animals
Biological Evolution
birds
cortex
evolution
genes
mammals
Models, Biological
neocortex
Neocortex - cytology
neurons
Phylogeny
Vertebrates - anatomy & histology
Vertebrates - genetics
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Summary:The evolutionary origin of the six-layered mammalian neocortex has been controversial. New data on genes with layer-specific expression in mammalian cortex have found an expression pattern in avian forebrain neurons consistent with the view that ‘cortical’ cells and circuits are present in all amniotes, but with different macroarchitectures in birds versus mammals.
ISSN:0960-9822
1879-0445
DOI:10.1016/j.cub.2012.11.013