Relating to or characterized by clonus, which is rhythmic muscle contractions that happen involuntarily, especially during seizures.
From Greek klonos meaning 'turmoil' or 'tumult,' referring to the turbulent, jerky muscle movements.
Doctors distinguish between 'clonic' seizures (where muscles jerk rhythmically) and 'tonic' seizures (where muscles lock up), and sometimes a patient experiences both at once in a 'tonic-clonic' seizure.
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