greentek sleep EEG cap: length of instructional video: 2 minutes number of papers with greentek sleep EEG cap on Google Scholar: https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=greentek+sleep+EEG+cap&btnG= we did not find any. The video shows an example of 5 seconds where the sleep cap has an EEG signal which has no issues. Are there any examples which proof that it …