Question 84

The evolutionary purpose of the Moro reflex is to help infants cling to the caregiver.

The Moro reflex, also known as the startle reflex, serves an important evolutionary function by promoting attachment between an infant and their caregiver, thereby enhancing the infant's chances of survival.

A) find the nipple

While finding the nipple is crucial for feeding, the Moro reflex specifically does not facilitate this action. Instead, the reflex is more about the infant's response to perceived threats, leading to a clinging behavior that fosters bonding with the caregiver.

B) cling to the caregiver

This option correctly identifies the primary purpose of the Moro reflex. When an infant experiences a sudden loss of support or a loud noise, the reflex triggers a startle response that often results in the infant reaching out and clinging to the caregiver, thereby reinforcing the caregiver-infant bond and enhancing safety.

C) prepare for walking

The Moro reflex does not contribute to the preparation for walking. Walking involves coordination and muscle strength that develop later in infancy, while the Moro reflex is primarily a survival mechanism during the early months of life.

D) prepare for reaching

Although the Moro reflex may involve reaching as part of the startle response, its main evolutionary purpose is not to prepare for reaching. Instead, it focuses on clinging to the caregiver, which provides security during times of distress.

E) survive if placed in water

The Moro reflex does not have a direct relationship with survival in water. Its primary function is related to the infant's need for security and attachment rather than aquatic survival strategies.

Conclusion

The correct answer, B, highlights the critical role of the Moro reflex in fostering attachment to the caregiver, which is essential for an infant's survival. All other options fail to capture this primary function, instead focusing on actions that are either unrelated or secondary to the primary purpose of the reflex. Thus, the Moro reflex is fundamentally about ensuring the infant's safety through closeness to their caregiver.