Nature Neuroscience 9, 880 - 886 (2006)
Published online: 18 June 2006; | doi:10.1038/nn1726
The first neurons of the human cerebral cortexIrina Bystron1, 2, Pasko Rakic3, Zoltán Molnár1
& Colin Blakemore11
Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, Oxfordshire OX13PT, UK. 2
Department of Morphology, Institute of Experimental Medicine, St. Petersburg, Russia. 3
Department of Neurobiology and Kavli Institute of Neuroscience, Yale University Medical School, New Haven, Connecticut 06520-8001, USA.
Correspondence should be addressed to Irina Bystron irina.bystron@physiol.ox.ac.uk We describe a distinctive, widespread population of neurons situated beneath the pial surface of the human embryonic forebrain even before complete closure of the neural tube. These 'predecessor' cells include the first neurons seen in the primordium of the cerebral cortex, before the onset of local neurogenesis. Morphological analysis, combined with the study of centrosome location, regional transcription factors and patterns of mitosis and neurogenesis, indicates that predecessor cells invade the cortical primordium by tangential migration from the subpallium. These neurons, described here for the first time, precede all other known cell types of the developing cortex.
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