english: And by placing electrodes all over the head, what we've discovered is that there are big, powerful brainwaves that happen during the very deepest stages of sleep that have riding on top of them these spectacular bursts of electrical activity that we call sleep spindles.
non_english: Postavljajući elektrode svuda po glavi, otkrili smo da postoje veliki, moćni moždani talasi koji se dešavaju u najdubljim fazama sna i koji imaju bljeske na ispupčenjima, te spektakularne eksplozije električne aktivnosti koje zovemo „vretena spavanja”.