Have you ever noticed how your baby's facial features and limbs twitch every now and then while he or she is sleeping? You may have assumed the twitches were a natural reaction to a dream—but one ...

When her daughter was born two-and-a-half years ago, Mary Goldsberry-Troyer eagerly watched for the typical developmental milestones in her firstborn. She noted when Vivi smiled, rolled over, and took ...

We've all been there: you're just trying to watch TV or get some work done, when all of a sudden your eye starts gently pulsing and flickering, before morphing into some full-on twitching. But what ...