gene expression as well as functional imaging techniques permits researchers to correlate between gene expression, cell types, and pathway function in relation to behaviors or phenotypes. Even though the majority of research has been done in mice, 90% of genes in mice have a counterpart in humans. This makes the Atlas particularly useful for modeling neurological diseases. The gene expression patterns in normal individuals provide a standard for comparing and understanding altered phenotypes. Extending information learned from mouse diseases will help better the understanding of human neurological disorders. The atlas can show which genes and particular areas are effected in neurological disorders; the action of a gene in a disease can be evaluated in conjunction with general expression patterns and this data could shed light on the role of the particular gene in the disorder. Brain explorer The Allen Brain Atlas website contains a downloadable 3-D interactive Brain explorer. The explorer is essentially a search engine for locations of gene expression; this is particularly useful in finding regions that express similar genes. Users can delineate networks and pathways using this application by connecting regions that co-express a certain gene. The explorer uses a multicolor scale and contains multiple planes of the brain that let viewers see differences in density and expression level. The images are a composite of many averaged samples so it is useful when comparing to individuals with abnormally low gene expression. Atlases Mouse Brain The Allen Mouse Brain Atlas is a comprehensive genome-wide map of the adult mouse brain that reveals where each gene is expressed. The mouse brain atlas was the original project of the Allen Brain Atlas and was finished in 2006. The purpose of the atlas is to aid in the development of neuroscience research. The hope of the project is that it will allow scientists to gain a better understanding of brain diseases and disorders such as autism and depression. Human Brain The Allen Human Brain Atlas was made public in May 2010. It was the first anatomically and genomically comprehensive three-dimensional human brain map. The atlas was created to enhance research in many neuroscience research fields including neuropharmacology, human brain imaging, human genetics, neuroanatomy, genomics and more. The atlas is also geared toward furthering research into mental health disorders and brain injuries such as Alzheimer's disease, autism, schizophrenia and drug addiction. Developing Mouse Brain The Allen Developing Mouse Brain Atlas is an