Are myclonic jerks actually seizures?

Positive myoclonus : is a symptom, not a disease. Sudden, brief involuntary contractions of a muscle or muscle group, like hiccups, , the motor component of being startled & jerks that awaken a person who's falling asleep occur in normal, healthy people. Widespread, often bilateral & recurrent myoclonus that impacts function is seen in myoclonic epilepsies in kids & adults & in various neurological disorders.

Myoclonic jerks: There is a type of seizure called myoclonic, or myoclonic jerks. These are a feature of myoclonic epilepsy. These feel like a brief episode of shaking. They may occur in the morning time more often than other times. Sleep deprivation may make them more noticeable.