Understanding Seizure Types
Myoclonic Seizures
These seizures produce very brief, sudden muscle jerks, either individually or in a series.
About this information
ESCO reviews this information regularly. It supports learning and does not replace professional medical advice, diagnosis or treatment. Discuss your own care with your healthcare provider.
What might happen?
An arm or shoulder may jerk, causing a dropped object or spilled drink. Balance can be affected. Consciousness often remains preserved during a brief event.
Not every jerk is epilepsy.
Myoclonus describes movement with several possible causes. Ordinary sleep-start jerks should not automatically be considered seizures.
Share the pattern.
Tell the healthcare team when jerks occur, whether they cluster, which body parts move and whether other symptoms follow. Seek advice about new or increasing events; do not change medication independently.
Reduce immediate hazards.
Help the person avoid hot liquids and sharp objects during repeated jerks. Avoid restraint and follow their action plan.
Call 911 for breathing problems, serious injury, prolonged convulsions or repeated seizures without recovery. A markedly different pattern needs attention even when individual jerks are brief.