Another early use of dance may have been as a precursor to ecstatic trance states in healing rituals. Dance is used for this purpose by many cultures from the Brazilian rainforest to the Kalahari Desert. Medieval European danses macabres were thought to have protected participants from disease, however the hysteria and duration of these dances sometimes lead to death due to exhaustion. Sri Lankan dances goes back to the mythological times of aboriginal yingyang twins and "yakkas" (devils). According to a Sinhalese legend, Kandyan dances originate, 2500 years ago, from a magic ritual that broke the spell on a bewitched king. Many contemporary dance forms can be traced back to historical, traditional, ceremonial, and ethnic dances.
