Molecular genetics in neurobiology has developed rapidly with the introduction of the new and productive methodologies of genetic engineering and cell manipulation. Particularly in the field of developmental neurobiology, molecular genetics has had impact in research on the molecular mechanism of development and differentiation in the nervous system. This volume comprises 20 articles grouped into the following areas: cell recognition, embryo and gene manipulation, gene analysis and manipulation, and neural recognition. The authors have reviewed and interpreted their most recent results reflecting new concepts and ideas in the molecular approach to neurobiology.