Two ongoing, large-scale projects may help better define neuroanatomy by using gene expression to classify the regions and cells of the mouse brain.
The brain in many ways remains uncharted. Scientists estimate there are about 1000 different types of neurons, many as yet undefined, and there is ongoing debate about the boundaries of anatomic regions. But the emergence of genomics has provided a basis for the development of new tools for systematically mapping all the genes, and regions of the brain.
Kuehn BM. Genomics Proving a Powerful Tool for Mapping the Landscape of the Brain. JAMA. 2006;295(2):145–148. doi:10.1001/jama.295.2.145