The acoustic startle response is an unconditional reflex manifested as a rapid contraction of facial and skeletal muscles in response to a sudden and intense startling stimulus. Translational research ...

If your newborn is startled, they might cry out and curl up. This reflex is normal for the first few months of life and is something your baby’s doctor may check for after delivery. If your new baby ...

Anxiety is associated with a spectrum of behaviors, including temperamental traits, conditioned and innate fear, anxiety disorders and depression. Anxiety disorders account for an essential part of ...