ABSTRACT
The development of motor skills is a continuous and age-related process, driven by interacting factors. Both universality and variability co-exist, allowing for a ‘family’ of trajectories that lead to motor development. In typical development foundational skills such as lifting the head in prone, sitting unsupported and pulling to stand appear in an order and time frame during infancy that has been remarkably consistent over decades of observation. These are honed into fundamental motor skills, which can be categorized into body transport (locomotion), object projection (ballistic) and object manipulation (manipulative) skills. Developmental trajectories of typically developing individuals represent a predictable progression with individual differences in timing and sequencing based on unique experiences.
