The purpose of this article is to present a behavioral model of human motor acts that may have relevance for therapeutic procedures aimed at the restoration of motor function after neurological or orthopedic problems. A key point of this model is that motor behavior is the result of an integrated and adaptive biological system. Cognitive, perceptual, and motor mechanisms are not independent elements, but are viewed as inseparable parts of this functional system. Implications for therapy are discussed. [Mulder T. A process-oriented model of human motor behavior: toward a theory-based rehabilitation approach.