The protomap is propagated to cortical plate neurons through an Eomes-dependent intermediate map.

@article{Elsen2013ThePI,
  title={The protomap is propagated to cortical plate neurons through an Eomes-dependent intermediate map.},
  author={Gina E. Elsen and Rebecca D. Hodge and Francesco Bedogni and Ray A M Daza and Branden Ray Nelson and Naoko Shiba and Steven L Reiner and Robert F Hevner},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2013},
  volume={110 10},
  pages={4081-6}
}
The cortical area map is initially patterned by transcription factor (TF) gradients in the neocortical primordium, which define a "protomap" in the embryonic ventricular zone (VZ). However, mechanisms that propagate regional identity from VZ progenitors to cortical plate (CP) neurons are unknown. Here we show that the VZ, subventricular zone (SVZ), and CP contain distinct molecular maps of regional identity, reflecting different gene expression gradients in radial glia progenitors, intermediate… CONTINUE READING
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