Medicine & USMLE

4 Months

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Developmental Milestones
  1. 2 Months
  2. 4 Months
  3. 6 Months
  4. 9 Months
  5. 12 Months
  6. 18 Months
  7. 2 Years
  8. 3 Years
  9. 4 Years
  10. 5 Years

Summary

Coming soon...

Key Points

  • 4 Month Developmental Milestones
    • Gross Motor
      • Rolls (from prone)
      • Sits only with external trunk support
      • Moro and Rooting Reflexes disappear
    • Fine Motor
      • Grasp objects (palmar)
        • Puts things in mouth
      • Hands mostly open
        • Persistent fisting is a red flag of developmental delay
      • Reaches for midline
    • Language
      • Laughs
    • Social/Cognitive
      • Orients to voice
        • Becomes calmed by parent’s voice
        • Failure to orient to environmental stimuli is a red flag for developmental delay

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