When the nurse makes a loud noise near the infant, the infant reacts by arching his back and assuming a typical posture with flexion and adduction of the extremities, and his fingers fan initially. This is called the:

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The Moro reflex (startle response) can be elicited by making a loud noise near the baby, who will react by arching his back and assuming a typical posture with flexion and adduction of the extremities and fingers fanned initially.

When the Nurse Makes a Loud Noise near the Infant