I scare easily – should I be concerned? | News This response, typically referred to as the startle reflex, is an involuntary reaction to external stimuli While everyone has a startle reflex, intensity varies from person to person, making some individuals more jumpy than others
Startle response - Wikipedia The startle reflex is a brainstem reflectory reaction (reflex) that serves to protect vulnerable parts, such as the back of the neck (whole-body startle) and the eyes (eyeblink) and facilitates escape from sudden stimuli It is found across many different species, throughout all stages of life
Why Do Babies Startle: Causes and When to Worry Babies startle because of an involuntary protective reflex they’re born with, called the Moro reflex When a newborn senses a sudden change in position, a loud noise, or bright light, their arms fling outward with palms up, their back arches, and then their arms slowly curl back in toward their body