A newborn sleep cycle runs roughly 20 to 50 minutes, significantly shorter than an adult’s 90-minute cycle. The first portion is active (REM-like) sleep, during which babies twitch, grimace, and are ...

Your baby’s flinch when his sister screams feels alarming, and you want a clear answer about whether it harms him. A startled reaction is usually a normal reflex, not a sign of lasting damage, but ...

We all jump at an unexpected noise or touch, but in some people, this startle response is exaggerated, and can cause falls and even death. Now, researchers in the United Kingdom have found new genes ...

The startle response is a sudden, reflex-like response to an unexpected stimulus, such as a loud noise or bright light. It is an unlearned and largely unconscious defense mechanism shared by animals ...

Here's what to expect in your baby's first month, including developmental milestones, nappy changes, sleeping and feeding patterns. Welcoming a new baby is exciting – but it can also feel overwhelming ...

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 ...