Just had letter back from hospital after having electrophysiological tests done, says I have slightly lower conduction on left leg and that test suggest it is true myoclonus with no overlying functional element, I have to go for a MRI scan as I have suffered this for 5 yrs and it was 5yrs since I had MRI and lumber puncture done, jerks have got worse everyday now for past 4 months. What I am really asking is what is true myoclonus or what is wrong with me. Any ideas.