Activity of midbrain reticular formation and neocortex during the progression of human non-rapid eye movement sleep. - Kajimura,N.; Uchiyama,M.; Takayama,Y.; Uchida,S.; Uema,T.; Kato,M.; Sekimoto,M.; Watanabe,T.; Nakajima,L.; Horikoshi,S.; Ogawa,K.; Nishikawa,M.; et al. (J Neurosci, 1999)