Pyrrhus
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I thought I would start a thread to summarize people's experiences with either muscle twitching (fasciculations) or limb jerking (myoclonus) in ME.
Note that there are also other types of involuntary movements in ME, such as tremors, cramps, eyelid twitching, restless legs syndrome, etc.
- Fasciculations are entirely involuntary twitching of a single small part of a muscle, but not jerking of an entire muscle or limb.
- Myoclonus is jerking of an entire muscle or limb, which may be related to, but is distinct from fasciculations. When it occurs while you are falling asleep, they are called hypnic jerks.
Note that there are also other types of involuntary movements in ME, such as tremors, cramps, eyelid twitching, restless legs syndrome, etc.
There are myoclonic jerks, and there are also fasciculations.
I believe that fasciculations when they occur are localized to one muscle, or part of the muscle, like the twitching hand muscle in this video.
Whereas myoclonic jerks are movement jolts that involve larger portions of the body, as shown in this video.
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