convulsed russian

• заходи́вшийся

  having started crying hysterically, convulsed with crying, sobbing uncontrollably

• корчимый

  writhing, being contorted, convulsed, twisted

• обхохота́вшийся

  having burst out laughing, convulsed with laughter, having laughed one's head off

Examples

• Его тело сотрясали конвульсии от боли.

  His body was convulsed with pain.

• Мальчик, корчившийся от смеха, не мог остановиться.

  The boy, convulsed with laughter, could not stop.