A member asked:

Right shoulder keeps jolting, like a reflex, doesn't hurt and no trigger i can notice. kind of like a big twitch every now and then, what could it be?

A doctor has provided 1 answer

Tic or myoclonus: You're describing is most likely for a tic or a short duration benign myoclonus. Differences between the two is how significant is the amplitude of the contraction.

Answered 3/25/2014

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What could be the cause of muscle twitching in my shoulder?

A doctor has provided 1 answer