Which neonatal reflex typically disappears by 4-6 months?

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Study for the CMS Practical Nursing (PN) Pediatrics Test. Master pediatric nursing with multiple choice questions, hints, and detailed explanations. Prepare with confidence!

Multiple Choice

Which neonatal reflex typically disappears by 4-6 months?

Explanation:
The idea being tested is when primitive infant reflexes fade as the nervous system matures. The Moro reflex, a startle response to a sudden loss of support or loud noise, is present at birth and normally fades away by about 4 to 6 months as neural pathways mature and reflex inhibition develops. That makes the statement that the Moro reflex disappears by 4–6 months the best match. Rooting tends to disappear around the 4-month mark, and the palmar grasp diminishes as voluntary grasp emerges, but the 4–6 month window is most consistently associated with Moro integration, whereas claiming disappearance by 3 months is earlier than typical.

The idea being tested is when primitive infant reflexes fade as the nervous system matures. The Moro reflex, a startle response to a sudden loss of support or loud noise, is present at birth and normally fades away by about 4 to 6 months as neural pathways mature and reflex inhibition develops. That makes the statement that the Moro reflex disappears by 4–6 months the best match. Rooting tends to disappear around the 4-month mark, and the palmar grasp diminishes as voluntary grasp emerges, but the 4–6 month window is most consistently associated with Moro integration, whereas claiming disappearance by 3 months is earlier than typical.

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