"Totonou"时会发生什么？为了更加了解这一现象，我们使用MEG（Magnetoencephalography）这一超高精度脑电图检测技术，分析了30名体验者在桑拿前后大脑机能的变化，并观察到了一个有趣的现象。 除了与人体放松状态有关的α波被正常化外，在放松过程中常常被抑制的β波仅有位于大脑右侧顶叶的一部分会被激活。大脑的右侧顶叶负责包括空间和视觉感知、身体感觉与位置信息在内的所有的感官认知。这与桑拿爱好者的反馈是一致的，例如在"Totonou"时脑海中浮现了新的想法，或开始意识到平时没有察觉到的声音和气味等等。此外，β波会因此而减弱。 由于β波的强弱与大脑的兴奋程度成反比，因此当我们蒸完桑拿后，会发觉自己变得精神焕发，头脑也感觉更加清醒。
Historical Background of Art and Sauna: Rinkan-Chanoyu
In the middle of the Muromachi Period (1336 - 1573), a type of tea ceremony in which tea was served to guests after their baths was called rinkan-chanoyu (rinkan sauna and tea ceremony). Much like with shoin-cha (decorative tea time), paintings, incense burners, vases, and hanging scrolls were displayed in the bathing rooms, and it is said that many spectators came to watch toucha (tea-tasting games) after bathing.
Rinkan-chanoyu was a widely-practiced basara (eccentric hobby) in Japan, particularly at the Kofukuji Temple in Nara.
In those days, a bath was a steam bath, or what we would today call a sauna, in which water is poured over heated sauna stones. People in Japan have long enjoyed the acts of viewing art in a sauna and drinking tea as a cultural pastime.
The term basara refers to the social and cultural trends in the middle ages in Japan, mainly during the early Muromachi Period (the Nanboku-cho Period). It was an aesthetic of meritocracy, one that disregarded the status quo, belittled, ridiculed, and rebelled against the authority of those noble in name alone, and instead favored extravagance, flamboyant behavior, and chic clothing. This culture was also the seed of the later revolutions in the Warring States Period.
It is said that Murata Juko (1422 - 1502), the teacher’s teacher of Sen no Rikyu (1522 - 1591) and the inventor of wabi-cha (tea ceremony), was also enamored with rinkan-chanoyu when he was young. He later studied under the Japanese monk Sosun Ikkyu at Daitokuji Temple, reached a state of chazenichimi (the realization that tea ceremony and Zen are one), and created wabi-cha. Then, the brothers Furuichi Choei and Furuichi Choin, who were main figures of rinkan-chanoyu, became disciples of Murata Juko, and rinkan-chanoyu became wabi-cha.