What Is Startle Reflex?

In animals, including humans, the startle response is a largely unconscious defensive response to sudden or threatening stimuli, such as sudden noise or sharp movement, and is associated with negative affect. Usually the onset of the startle response is a startle reflex reaction.

What is the purpose of the startle reflex?

This reflex helps babies develop the controlled skill of walking, which they'll probably start doing around their first birthday. These reflexes are a normal part of a baby's development. They help your baby function in the world.

What causes startle reflex baby?

Moro reflex (startle reflex)

Trigger: While some babies sometimes startle for no apparent reason, usually it's in response to a loud noise, a sudden movement or the sensation of falling (say, when you put your little one down in his bassinet without enough support).