This detailed volume presents validated and well-adapted procedures involving humanized and/or stem cell-based neural model systems that have proven helpful in better understanding the essential brain functions involved in the pathogenesis of brain disorders. The book explores the generation of multiple neural cell types in 2D and 3D as well as cutting-edge techniques to assay neural function. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step and readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.