Our motor skills determine how well we perform in athletics, dance, music, and in carrying out countless daily chores. While our proficiency at performing individual actions and synthesizing them into seamless sequences limits our athletic and artistic talents, we are not perpetually bound by such limitations. The nervous system can acquire new, and modify old, motor behaviors through experience and practice. That is motor learning. The Acquisition of Motor Behavior in Vertebratesprovides a broad, multidisciplinary survey of recent research on the brain systems and mechanisms underlying motor learning. Following the editors' introduction, nineteen contributions report on the neurobiology of these higher brain functions and on diverse types of motor learning such as reflex adaptation, conditioned and instrumental reflex learning, visually guided actions, and complex sequences and skills.