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 ...

(National) March 5, 2004 - Kim Pullin enjoys visits to the park with her daughter, something her Multiple Sclerosis would have made impossible not long ago, "The spasms appeared in my arm, in my leg, ...

You could be fast asleep when suddenly, a sharp, paralyzing stiffness jolts you awake—usually in your calf or foot. These episodes, commonly known as foot or leg cramps, occur when a muscle tightens ...