Medically reviewed by Jonathan B. Jassey, DO Key Takeaways The Moro reflex is a startle response in babies that makes their arms extend and retract. Newborns grow out of the Moro reflex within the ...

What is the acoustic reflex? When a loud sound stimulus is presented to the ear, there is a reflexive contraction of the minute muscles that are connected to the ossicles in the Middle Ear. When these ...