Observatoire des droits humains (anglais seulement)

Muscle twitches: why they happen and what they mean

(Version anglaise seulement)

par Adam Taylor, Professor of Anatomy, Lancaster University

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 spasm – sometimes for a few seconds, sometimes for hours or even days. It’s an unsettling sensation that affects about 70% of people at some point in their lives.

Muscle twitches fall into two main types. There’s myoclonus, where a whole muscle or group of muscles twitch or spasm. Then there’s fasciculation,…

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