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Movement is critical for individuals to interact with their environment, particularly during the first years of life. As such, it constitutes a means of understanding of typical and atypical development. This paper presents an integrated view of motor development derived from the neuroconstructivist model. According to this view, motor development depends on the growth and maturation of brain and body. Furthermore, it relies on sensory, cognitive, social, and emotional development, which are also influenced by motor development. Applied to developmental disorders, this approach implies that any motor disorder is often associated with disturbances of functioning in other domains. Thus, the transition between typical and atypical action development falls somewhere along a continuum. It is then appropriate to identify the trajectory and cascades that lead to specific dysfunctions and the adjustments implemented during development. Through several examples, in particular developmental coordination disorder, this article illustrates the fundamental mechanisms of motor development and their adaptations in the case of atypical development. The article also proposes guidelines for clinical practice.