A 5-month-old infant is brought for routine immunisation. On examination, the Moro reflex is still elicitable. The mother asks when this reflex normally disappears. By what age should the Moro reflex normally be integrated?
- A By 6 months ✓
- B By 4 months
- C By 2 months
- D By 9 months
Correct answer: A. By 6 months
Explanation
The Moro reflex is a primitive reflex present at birth and normally integrates by 4 to 6 months of age. Persistence beyond 6 months suggests upper motor neuron pathology or cerebral palsy. The palmar grasp reflex disappears by 6 months, while the asymmetric tonic neck reflex integrates by 4 months. Persistence of primitive reflexes beyond expected integration ages is a red flag for neurodevelopmental delay.
Reference: Nelson Textbook of Pediatrics, 21st ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.