Neurogenetics studies are defined as the role of genetics in the development and function of the nervous system. It considers neural characteristics as phenotypes (i.e. manifestations, measurable or not, of the genetic make-up of an individual), and is mainly based on the observation that the nervous systems of individuals, even of those belonging to the same species, may not be identical. The field of neurogenetics emerged from advances made in molecular biology, genetics and a desire to understand the link between genes, behavior, the brain, and neurological disorders and diseases. Recombinant DNA is an important method of research in many fields, including neurogenetics. It is used to make alterations to an organism’s genome, usually causing it to over- or under-express a certain gene of interest, or express a mutated form of it. Neurogenetics diseases—inherited diseases of the nervous system—are being diagnosed in growing numbers among both children and adults, as a result of advances in biochemical and molecular genetics. Neurogenetics presents research that contributes to better understanding of the genetic basis of normal and abnormal function of the nervous system. Neurogenetics provides diagnostic services, therapeutic interventions, and genetic counseling for a broad spectrum of disorders affecting the brain and central nervous system. The Neurogenetics Section focuses on identifying genetic factors involved in the development of mental illnesses and addictions. The neurogenetics group provides diagnosis and management of individuals with neurogenetic disorders, applying the techniques of molecular diagnosis.