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| Description: The EEG of alert wakefulness, the EEG that precedes sleep onset, and the four stages of sleep EEG. Each trace is about 10 seconds long. Picture Stats: Views: 343 Filesize: 214.93kB Height: 815 Width: 690 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=30399 |