We are generating and analyzing the first genome scale, high resolution map of gene expression in an entire nervous system (CeNGEN, the C. elegans Neuronal Gene Expression Network). This work is a collaboration with the Hobert lab (Columbia), the Miller lab (Vanderbilt), and the Sestan lab (Yale). The basic idea behind the proposal is to use the well- characterized anatomy of C. elegans as a platform to map gene expression across a model nervous system.