You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or ...

If you've ever slammed your brakes to avoid hitting an animal darting across the road, scored the game-winning point during a ballgame, or experienced what seems like superhuman strength or speed when ...

In 1982, Angela Cavallo of Lawrenceville, Georgia received the Mom of the Year Award. (Not a real award, but if it existed, she would probably win, hands down.) Her son Tony was working on the ...

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...