It sounds like Nocturnal Myoclonus, or Periodic Limb Movement Disorder. The same thing happened to me. I'm taking anti-depressants and Ambian at night, which helps. Also have been going to a Homeopath, and have had 3 remedys, which is also helping.
The docs say it's a form or RLS. I did a web search, and there's a guy who had daytime myoclonus, a...
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