She turned away, shuddering off a convulsion as best she could, but another came and she was restless.

NEWYORKER: Faith

Another mystery: Once, hiking a mountain, she felt tired and went into convulsion.

CNN: Author makes peace with an undiagnosed illness

But the claim that the country was threatening to leave the euro seems to have been wrong, though it caused yet another market convulsion.

ECONOMIST: Germany continues to dither over how best to rescue the euro

This could be quite a major convulsion for the Lib Dems...

BBC: Week ahead

Indeed, as a student of France's troubled history and an observer of its politics for over half a century, I suspect France is entering a prerevolutionary phase and that a major convulsion is just over the horizon.

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