Which of the following newborn reflexes should still be present at the 9-month check-up?
(A) Galant reflex
(B) Moro reflex
(C) Parachute reflex
(D) Placing reflex
(E) Rooting reflex
The Correct Answer and Explanation is :
The correct answer is: (C) Parachute reflex.
Explanation:
Newborn reflexes, also known as primitive reflexes, are automatic responses present at birth and during early infancy. Most of these reflexes disappear as the brain matures and voluntary control takes over. However, some reflexes persist into later infancy or even throughout life.
Here’s a breakdown of the reflexes mentioned:
- Galant Reflex:
This reflex is seen when stroking one side of the newborn’s spine causes the baby to curve their body toward that side. It is present at birth and typically disappears by 4–6 months. - Moro Reflex:
Also known as the startle reflex, it involves the infant extending and then retracting their arms when startled. It typically disappears by 4–6 months. - Parachute Reflex:
This is a protective reflex where the baby extends their arms forward when tilted downward, as if to “break a fall.” It develops around 6–9 months and persists throughout life. It is essential for protective posturing. - Placing Reflex:
This occurs when the baby’s foot is brushed against an edge, prompting the leg to lift as if stepping. This reflex is present at birth but fades by 4–6 months. - Rooting Reflex:
In this reflex, the baby turns their head toward a stimulus (e.g., a touch on the cheek), seeking to latch onto the object. It helps with feeding and typically disappears by 4 months.
Why the Parachute Reflex Persists:
The parachute reflex is a protective mechanism that aids in preventing injury. Its persistence is a sign of healthy neurological development. Other primitive reflexes (like the Moro or rooting reflex) are no longer necessary as the infant grows, so their disappearance is expected. Thus, the parachute reflex should be present at a 9-month check-up.