350px A<unk>  is a waveform that may be seen on an electroencephalogram (EEG). It occurs during stage 2 of NREM sleep. It is the "largest event in healthy human EEG". They are more frequent in the first sleep cycles.<unk> es have two proposed functions: first, suppressing cortical arousal in response to stimuli that the sleeping brain evaluates not to signal danger, and second, aiding sleep-based memory consolidation. The<unk>  was discovered in 1937 in the private laboratories of Alfred Lee Loomis.
K-complex
Phi complex
Co-receptor
QS-21
Clathrin
Matrix-core
Internexin
NLRP3