Myoclonus Erratic myoclonus 2017-02-17T12:01:58Z true Fragmentary myoclonus HPO:probinson A type of myoclonus in which the myoclonias shift from body region to another in a random and asynchronous fashion. Erratic myoclonus can affect the face or limbs, are brief, single or repetitive, very frequent and nearly continuous. https://www.ncbi.nlm.nih.gov/books/NBK2599/ Erratic may appear immediately after birth.Definition adapted from The Epilepsies: Seizures, Syndromes and Management; Chapter 5: Neonatal Seizures and Neonatal Syndromes; NCBI Book NBK2599.