seizures, spasms, fits, tremors, jerks, twitches, contractions, paroxysms, shakes, shudders, quivers, throes, agitations, contortions, upheavals, disturbances, jolts, shocks
seizures, spasms, fits, tremors, jerks, twitches, contractions, paroxysms, shakes, shudders, quivers, throes, agitations, contortions, upheavals, disturbances, jolts, shocks