ABSTRACT The Neuroanatomy/Histology/Brain Injection Core (Core C) will facilitate neuroanatomical and histological studies for PPG Members. It will be used regularly by investigators from all 3 projects described in the PPG. Dr. Laurent Gautron will coordinate these services and resources, and will provide periodic training of personnel on the use of the equipment. Core C will also be an essential component of the characterization and validation of gene specific deletion mouse models proposed by all 3 projects. Core C is equipped with the equipment and expertise to provide the following services: Core C will provide the following services: Routine histology Immunolabeling RNA in situ hybridization Stereotaxic surgeriesMicroscopy Brain microdissection RNA isolation and qPCR analysis. The technical expertise in Cores C will provide multiple benefits to project investigators: Centralized Core services are more cost effective and prevent the duplication of reagents across Program investigators. Uniform standards and protocols will ensure that results from all Projects can directly be compared Provides technical expertise for protocols that are not routinely performed by Program investigators