The Sleeping Brain's Influence on Verbal Memory: Boosting Resistance to Interference

Memories evolve. After learning something new, the brain initiates a complex set of post-learning processing that facilitates recall (i.e., consolidation). Evidence points to sleep as one of the determinants of that change. But whenever a behavioral study of episodic memory shows a benefit of sleep, critics assert that sleep only leads to a temporary shelter from the damaging effects of interference that would otherwise accrue during wakefulness. To evaluate the potentially active role of sleep for verbal memory, we compared memory recall after sleep, with and without interference before testing. We demonstrated that recall performance for verbal memory was greater after sleep than after wakefulness. And when using interference testing, that difference was even more pronounced. By introducing interference after sleep, this study confirms an experimental paradigm that demonstrates the active role of sleep in consolidating memory, and unmasks the large magnitude of that benefit.

[1]  Wendy A. Suzuki,et al.  Encoding New Episodes and Making Them Stick , 2006, Neuron.

[2]  Jessica D. Payne,et al.  The role of sleep in declarative memory consolidation: passive, permissive, active or none? , 2006, Current Opinion in Neurobiology.

[3]  G. Bower,et al.  Reducing retroactive interference: an interference analysis. , 1994, Journal of experimental psychology. Learning, memory, and cognition.

[4]  C. Degueldre,et al.  Are Spatial Memories Strengthened in the Human Hippocampus during Slow Wave Sleep? , 2004, Neuron.

[5]  J. Born,et al.  Sleep after learning aids memory recall. , 2006, Learning & memory.

[6]  Atsuko Takashima,et al.  Sleep directly following learning benefits consolidation of spatial associative memory. , 2008, Learning & memory.

[7]  Adler J. Perotte,et al.  Methods for reducing interference in the Complementary Learning Systems model: Oscillating inhibition and autonomous memory rehearsal , 2005, Neural Networks.

[8]  J. Fell,et al.  Ripples in the medial temporal lobe are relevant for human memory consolidation. , 2008, Brain : a journal of neurology.

[9]  F. Craik,et al.  The Oxford handbook of memory , 2006 .

[10]  G E BRIGGS,et al.  Acquisition, extinction, and recovery functions in retroactive inhibition. , 1954, Journal of experimental psychology.

[11]  C. Smith Sleep states and memory processes in humans: procedural versus declarative memory systems. , 2001, Sleep medicine reviews.

[12]  J. Born,et al.  Sustained increase in hippocampal sharp-wave ripple activity during slow-wave sleep after learning. , 2008, Learning & memory.

[13]  Justin C. Hulbert,et al.  Interfering with Theories of Sleep and Memory: Sleep, Declarative Memory, and Associative Interference , 2006, Current Biology.

[14]  D. R. Euston,et al.  Fast-Forward Playback of Recent Memory Sequences in Prefrontal Cortex During Sleep , 2007, Science.

[15]  B. Underwood,et al.  Fate of first-list associations in transfer theory. , 1959, Journal of experimental psychology.

[16]  K. M. Dallenbach,et al.  Obliviscence During Sleep and Waking. , 1924 .

[17]  E. Wamsley,et al.  A daytime nap containing solely non-REM sleep enhances declarative but not procedural memory , 2006, Neurobiology of Learning and Memory.

[18]  H. Nusbaum,et al.  Consolidation during sleep of perceptual learning of spoken language , 2003, Nature.

[19]  J. Born,et al.  The contribution of sleep to hippocampus-dependent memory consolidation , 2007, Trends in Cognitive Sciences.

[20]  M. Steriade,et al.  Neuronal Plasticity in Thalamocortical Networks during Sleep and Waking Oscillations , 2003, Neuron.

[21]  M. Wilson,et al.  Coordinated memory replay in the visual cortex and hippocampus during sleep , 2007, Nature Neuroscience.

[22]  A. Braun,et al.  Regional cerebral blood flow throughout the sleep- wake cycle , 1997 .

[23]  R. Stickgold,et al.  Sleep, memory, and plasticity. , 2006, Annual review of psychology.

[24]  Michael Friendly,et al.  The Toronto Word Pool: Norms for imagery, concreteness, orthographic variables, and grammatical usage for 1,080 words , 1982 .

[25]  A. Braun,et al.  Regional cerebral blood flow throughout the sleep-wake cycle. An H2(15)O PET study. , 1997, Brain : a journal of neurology.