This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book reviews the influences on Janet Kestenberg Amighi, originator of the Kestenberg Movement Profile (KMP), and traces the work of the Sands Point Movement Study Group and more students of the KMP. Movement observations based on the KMP can extend the perspectives of developmental theories, highlighting drive and defense, object relations, psychosocial influences, patterns of dyadic interaction, attachment theory, and phase development. The use of movement analysis for psychological assessment and treatment rests on the understanding of the mind, emotions, and body as closely integrated, mutually interacting systems. The study of movement opens a door not only to understanding but also to movement-based therapeutic approaches such as Body-Mind Centering, dance/movement therapy, and/or movement retraining. The Austrian choreographer and movement educator, Rudolf Laban, conceived of and generated a system of dance notation and movement analysis.