Also known as the ‘startle reflex', is a reflex that is present at birth and typically disappears after a few months. It can be triggered by a sudden change in position or a loud noise. When babies are startled, they suddenly reach out their arms and hands, extend the neck, then bring the arms together and may even cry loudly. This reaction is normal and it even occurs during sleep.
When an infant is startled, the moro reflex makes them throw out the arms and arch their back.
a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs
If a newborn is startled by a sudden, loud noise, the Moro reflex will cause him to extend his arms, legs, and feet, arch his back and move his head back.
When sudden, loud noises startle a newborn, causing him to extend his arms, legs, and feet, arch his back and his head back.
An automatic reflex of a newborn where the baby extends the arms and legs when startled, as if to catch hold of something.
The automatic response to loud noises or sudden movements in which a newborn will extend his arms and legs, arch his back, and sometimes cry out. Newborns can have this reaction even during sleep, but lose it after a few months.
Movement of arms and legs that occurs when a newborn is startled by a loud sound or movement.
The Moro reflex, also known as the startle reflex, is one of the infantile reflexes. It may be observed in incomplete form in premature birth after the 28th week of gestation, and is usually present in complete form by week 34 (third trimester). It is normally lost by the 6th month of life postpartum.