The divorce of REM sleep and dreaming

The validity of dream recall is discussed. What is the relation between the actual dream and its later reflection? Nielsen proposes differential sleep mentation, which is probably determined by dream accessibility. Solms argu es that REM sleep and dreaming are double dissociable states. Dreaming occu rs outside REM sleep when cerebral activation is high enough. That various active sleep states correlate with vivid dream reports implies that REM sle ep Mid dreaming are single dissociable states. Vertes & Eastman reject that REM sleep is invoked in memory consolidation. Considerable evidence for th us was obtained by REM deprivation studies with the dubious water tank tech nique.