Mechanisms specifying area fate in cortex include cell-cycle-dependent decisions and the capacity of progenitors to express phenotype memory.

Abstract excerpt

Progenitor cells in the early developing cerebral cortex produce neurons destined for discrete functional areas in response to specific inductive signals. Using lineage analysis, we show that cortical progenitor cells at different fetal ages retain the memory of an area-specific inductive signal received in vivo, even though they may pass through as many as two cell cycles in the absence of the signal in culture....

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