title: Variation and "abnormality": recognizing the differences.
authors.forename: Peter
authors.initials: P
authors.lastname: Rosenbaum
mesh_terms: D002657:Child Development / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D018730:Infant Behavior / Q000502:physiology; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology*; D009048:Motor Skills / Q000502:physiology*; D009068:Movement / Q000502:physiology; D011187:Posture / Q000502:physiology; D013997:Time Factors; D016474:Weight-Bearing / Q000502:physiology