Helena first develops the ability to control her head.She then could sit up unassisted,and eventually could walk.This progression of motor development is called the ____.

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The cephalocaudal principle describes the pattern of growth and development that occurs from the head down. This means that infants first gain control of their head and neck, then their upper body and arms, followed by their lower body and legs. Helena's progression from controlling her head, to sitting up unassisted, and finally walking, aligns with this principle.

Helena First Develops the Ability to Control Her Head