Ma'anar ƙamus na kalmar "myotonic" yana da alaƙa da ko siffa ta myotonia, wanda shine yanayin jinkirin jinkirin tsokoki bayan naƙuda ko motsa jiki na son rai. Wannan zai iya haifar da taurin tsoka, musamman a cikin tsokoki na hannuwa, ƙafafu, da fuska, kuma yana iya shafar wasu sassan jiki kamar makogwaro, harshe, da fatar ido. Cututtukan myotonic rukuni ne na cututtukan neuromuscular da aka gada wanda ke haifar da myotonia a matsayin alama ta farko.