Neuronal processes enriched in genes that were up-regulated by testosterone in the HVC of female European robins and canaries. Probabilities with which GO-terms for neuronal processes were enriched in up-regulated genes were determined by GeneRanker (Genomatix) and ordered for robins within each neuronal process. Note that probabilities cannot be compared between species because of unequal total numbers of affected genes for each GO-term. Grey values indicate the probability of a biological process to be affected within a species. For complete lists of biological processes and explicitly neuronal processes enriched in down-regulated genes see Additional file 7: Table S3.