Luigi will have a Moro reflex reaction when 3-year-old Mario drives his tricycle near his 1-month-old sibling Luigi's cattle.
The Moro reflex is often referred to as the startle reflex. This is because it commonly occurs when a baby is startled by a loud noise or sudden movement. When a newborn screams, its head is thrown back, its arms and legs are extended, and then it draws those same arms and legs back in reaction to the sound.
The Moro response can be used to assess the health of the central nervous system in infants under 4 months of age and to spot peripheral issues such as congenital musculoskeletal abnormalities or neural plexus injuries; an asymmetrical response might signify unilateral weakness.
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