Quiet please, we’re sleeping!
The first of these are called spindles and the second are called K complexes. These waves are at the heart of a cerebral control process of auditory stimuli during sleep. The spindles prevent the transmission of sounds to the regions of the brain responsible for hearing, while the K complex waves reinforce the activation of these regions. These are the results of a study carried out by Thien Thanh Dang-Vu and Professor Pierre Maquet at the Cyclotron Research Centre (CRC) of the University of Liège.
(1) M. Boly, E. Balteau, C. Schnakers, C. Degueldre, G. Moonen, A. Luxen, C. Phillips, P. Peigneux, P. Maquet et S. Laureys, Baseline brain activity fluctuations predict somatosensory perception in humans, PNAS, 14 juillet 2007.