Replaying the game: Hypnagogic images in normals and amnesics

Participants playing the computer game Tetris reported intrusive, stereotyp ical, visual images of the game at sleep onset. Three amnesic patients with extensive bilateral medial temporal Lobe damage produced similar hypnagogi c reports despite being unable to recall playing the game. suggesting that such imagery may arise without important contribution from the declarative memory system. In addition, control participants reported images from previ ously played versions of the game, demonstrating that remote memories can i nfluence the images from recent waking experience.