Which characteristic is NOT associated with myoclonic seizures?

Myoclonic seizures are characterized primarily by sudden, brief muscle contractions, which may appear as rapid jerky movements. These seizures can affect segments of muscle groups and can occur in one or more extremities. The defining features of myoclonic seizures include the contraction of muscle groups, which is often observed as a quick, involuntary jerk or twitch, and they can involve varying body parts, thus affecting the extremities.

In contrast, prolonged muscle relaxation is not a feature associated with myoclonic seizures. Instead, myoclonic seizures are noted for their rapid onset and quick resolution of muscle activity, rather than a state of relaxation. Understanding these characteristics helps differentiate myoclonic seizures from other seizure types, which may include tonic seizures where sustained muscle contraction occurs, or atonic seizures characterized by sudden muscle relaxation.