Paeds · growth-development-and-behaviour
Normal motor development and developmental variation
Also known as Gross motor milestones · Fine motor development · WHO motor windows · Bottom shuffling · Normal variation in walking
Fellowship guide to normal gross and fine motor development, WHO windows of achievement, healthy variation including non-crawling paths, bedside motor examination, and the first decision between reassure, recheck or escalate.
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Target exams
Red flags
- Loss of previously acquired motor skills (regression)
- Asymmetric fisting or early hand preference with reduced use of one side
- Persistent abnormal tone — marked hypotonia or hypertonia with scissoring or stiff extension
- Not sitting without support well beyond the WHO upper window with poor quality
- Not walking alone beyond the WHO upper window with abnormal exam
- Progressive weakness, fatiguable power, or bulbar signs
- Infant too weak to feed or protect the airway
Life stages
Care settings
Clinical exam formats
Board mappings
- General and Community Paediatrics
- Growth and development
- Neurology and neurodevelopment
- Learning goal 10 developmental and behavioural paediatrics
- Learning goal 15 essential general paediatrics
- Learning goal 18 developmental and behavioural paediatrics
- Clinical Applications
- Long Cases
- Short Cases
- Development
- Neurodevelopment and Neurodisability
- Patient management
- Health promotion and illness prevention
- Foundation of Practice (FOP)
- Applied Knowledge in Practice (AKP)
- Theory and Science
- Clinical
- History
- Communication
- General Pediatrics Content Outline — Domain 2: Growth and Development
- General Pediatrics Content Outline — Domain 1: Preventive Pediatrics/Well-Child Care
- General Pediatrics EPA: Provide well-child and preventive care
- Patient Care 1: History
- Patient Care 4: Clinical Reasoning
- Patient Care 5: Patient Management
- Interpersonal and Communication Skills 1: Patient- and Family-Centered Communication
- Medical Expert
- Communicator
- Health Advocate
- Pediatrics: Foundations EPA — Assessing and providing routine care for a well child
- Development, Behaviour and Mental Health
Age versus quality
Age of first skill
Quality of movement
Overview & Definition
A parent says, “She is not crawling like her cousins.” Another says, “He walked at ten months — is early walking always good?” Your job is to separate normal motor development, healthy variation, and motor findings that need action. [1] [3]
Gross motor skills move the body through space: head control, rolling, sitting, locomotion, standing and walking. Fine motor skills use the hands for reach, grasp, transfer, pincer and tool use. Both rest on posture, tone and practice. Oral-motor feeding skill is adjacent but is not the whole motor story. [2]
A milestone is an observable skill. A trajectory is how skills build over months. Quality of movement is how the skill looks — stiff or floppy, symmetric or one-sided, variable or stereotyped. Examiners fail candidates who quote a single “should walk by twelve months” line and ignore quality. [1] [2]
This page owns normal sequences, WHO windows, common variation and the first clinic decision. Cross-link hypotonia work-up, cerebral palsy early recognition, developmental coordination disorder, specialised infant neuromotor tools, and surveillance or screening programmes rather than cloning those chapters. [3] [5] [6]
References13ShowHide
- [1]WHO Multicentre Growth Reference Study Group WHO Motor Development Study: windows of achievement for six gross motor development milestones. Acta Paediatr Suppl, 2006.PMID 16817682
- [2]Zubler JM Evidence-Informed Milestones for Developmental Surveillance Tools. Pediatrics, 2022.PMID 35132439
- [3]Lipkin PH Promoting Optimal Development: Identifying Infants and Young Children With Developmental Disorders Through Developmental Surveillance and Screening. Pediatrics, 2020.PMID 31843861
- [4]WHO Multicentre Growth Reference Study Group Assessment of sex differences and heterogeneity in motor milestone attainment among populations in the WHO Multicentre Growth Reference Study. Acta Paediatr Suppl, 2006.PMID 16817680
- [5]Novak I Early, Accurate Diagnosis and Early Intervention in Cerebral Palsy: Advances in Diagnosis and Treatment. JAMA Pediatr, 2017.PMID 28715518
- [6]Blank R International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder. Dev Med Child Neurol, 2019.PMID 30671947
- [7]Kuo DZ Recognition and Management of Medical Complexity. Pediatrics, 2016.PMID 27940731
- [8]Boylen S Impact of professional interpreters on outcomes for hospitalized children from migrant and refugee families with limited English proficiency: a systematic review. JBI Evid Synth, 2020.PMID 32813387
- [9]Forkey H Trauma-Informed Care. Pediatrics, 2021.PMID 34312292
- [10]Burvenich R Effectiveness of safety-netting approaches for acutely ill children: a network meta-analysis. Br J Gen Pract, 2025.PMID 39117428
- [11]Starmer AJ Changes in medical errors after implementation of a handoff program. N Engl J Med, 2014.PMID 25372088
- [12]Katz AL Informed Consent in Decision-Making in Pediatric Practice. Pediatrics, 2016.PMID 27456510
- [13]Szilagyi MA Health Care Issues for Children and Adolescents in Foster Care and Kinship Care. Pediatrics, 2015.PMID 26416941