Status epilepticus with prominent motor symptoms Myoclonic status epilepticus true A type of motor status epilepticus with repeating bilateral sudden brief (less than 100 ms) involuntary single or multiple contraction of muscles or muscle groups of variable topography. https://www.ncbi.nlm.nih.gov/pubmed/26336950 peter The myoclonic seizures are usually generalized. The duration or frequency of myoclonic jerks required to qualify as myoclonic status is not defined, but they should occur frequently and long enough to significantly impair functioning. A reasonable general definition might be that myoclonus must occur either (1) at least once every 10 seconds for longer than 10 minutes or (2) at least once a minute for longer than 30 minutes.