This volume describes from an interdisciplinary perspective human motor development using longitudinal study methods. The biological basis of motor development is discussed, looking at mechanisms of embryonic growth and fetal development. Fetal movement patterns and developmental processes and adaptations that continue throughout childhood are also treated. Chapters cover the mechanisms that underlie the development of posture, goal-directed behavior, movement patterns for communication and the acquisition of skills, such as tool use and writing. The book also considers how the developmental process can go wrong. Possible risk factors for abnormal motor development are discussed and the adaptive processes that accompany motor deficiencies in childhood and later life are also described.