Nature Reviews Neuroscience 8, 655 (September 2007)

An interneuron’s birth date may determine its molecular and physiological phenotype.

The enormous diversity of cortical interneuron subtypes presents a challenge for our understanding of their functional roles. A study by Fishell and colleagues examines the origins of interneuron diversity during development, highlighting the importance of an interneuron’s birth order in establishing its physiological properties…

Link to the full review.