It seems to me that the diagnosis of myoclonus, is given when symptoms don’t fit “neatly” in to other more common neurological conditions. It is what my neurologist thinks I have, but is not sure. It has been one of 5 or 6 things she has tested me for. I have had multiple EMGs and full imaging of brain, nerves, spine, and blood vessels. Even a 96 hour, in home, video EEG study with cameras. I knew they would not see a seizure while I was confined to my house for four days. It only happens when I am walking or active. And while I have no seizure disorder based on that test, I am on keppra (which is an anti-seizure drug) for what starts as my right quad firing, weakness and the resulting, intermittent falling. Getting to a dosage of 2,000 mg a day has eliminated the falls, but having to deal with side effects like constipation suck. It is very frustrating when no one knows what you have. I had a second opinion at the Yale Mobility Clinic . But still no answers! And I’ve spent hours trying to research anything online that seems like what I have.