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 ...

Do your muscles still spasm after a run? This is most likely muscle fasciculation, where the voluntary muscle units are randomly firing and not under the usual central nervous system neurologic ...

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