Sleep Preferentially Enhances Memory for Emotional Components of Scenes

Central aspects of emotional experiences are often well remembered at the expense of background details. Previous studies of such memory trade-offs have focused on memory after brief delays, but little is known about how these components of emotional memories change over time. We investigated the evolution of memory for negative scenes across 30 min, 12 daytime hours spent awake, and 12 nighttime hours including sleep. After 30 min, negative objects were well remembered at the expense of information about their backgrounds. Time spent awake led to forgetting of the entire negative scene, with memories of objects and their backgrounds decaying at similar rates. Sleep, in contrast, led to a preservation of memories of negative objects, but not their backgrounds, a result suggesting that the two components undergo differential processing during sleep. Memory for a negative scene develops differentially across time delays containing sleep and wake, with sleep selectively consolidating those aspects of memory that are of greatest value to the organism.

[1]  D. Schacter,et al.  The neural origins of specific and general memory: the role of the fusiform cortex , 2005, Neuropsychologia.

[2]  J. Born,et al.  Emotional memory formation is enhanced across sleep intervals with high amounts of rapid eye movement sleep. , 2001, Learning & memory.

[3]  L. Jacoby,et al.  The Relation between Remembering and Knowing as Bases for Recognition: Effects of Size Congruency , 1995 .

[4]  J. Wixted.  The psychology and neuroscience of forgetting. , 2004, Annual review of psychology.

[5]  J. Born,et al.  Brief Sleep After Learning Keeps Emotional Memories Alive for Years , 2006, Biological Psychiatry.

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

[7]  R. Stickgold.  Sleep-dependent memory consolidation , 2005, Nature.

[8]  Rachel J. Garoff-Eaton,et al.  Effects of Emotion on Memory Specificity: Memory Trade-Offs Elicited by Negative Visually Arousing Stimuli. , 2007 .

[9]  J. Born,et al.  Sleep to Remember , 2006, The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry.

[10]  Lynn Nadel,et al.  The Biopsychology of Trauma and Memory , 2004 .

[11]  S. Kaplan,et al.  Paired-associate learning as a function of arousal and interpolated interval. , 1963, Journal of experimental psychology.

[12]  D. G. MacKay,et al.  Does emotion help or hinder immediate memory? Arousal versus priority-binding mechanisms. , 2006, Journal of experimental psychology. Learning, memory, and cognition.

[13]  Rebecca L. Gómez,et al.  Naps Promote Abstraction in Language-Learning Infants , 2006, Psychological science.

[14]  S R Schmidt.  Effects of humor on sentence memory. , 1994, Journal of experimental psychology. Learning, memory, and cognition.

[15]  Suparna Rajaram,et al.  Remembering and knowing: Two means of access to the personal past , 1993, Memory & cognition.

[16]  Robert D. Tarte,et al.  Memory Storage as a Function of Arousal and Time with Homogeneous and Heterogeneous Lists , 1963 .

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

[18]  J. Byrne.  Learning and memory : a comprehensive reference , 2008 .

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

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

[21]  Andrew P. Yonelinas,et al.  Differential time-dependent effects of emotion on recollective experience and memory for contextual information , 2008, Cognition.

[22]  J. Born,et al.  Learning-Dependent Increases in Sleep Spindle Density , 2002, The Journal of Neuroscience.

[23]  Matthew P Walker,et al.  Sleep Facilitates Consolidation of Emotional Declarative Memory , 2006, Psychological science.

[24]  Thomas C. Johnson,et al.  Effects of stress induced by a simulated shooting on recall by police and citizen witnesses. , 2000, The American journal of psychology.

[25]  W. Dement,et al.  Quantification of sleepiness: a new approach. , 1973, Psychophysiology.

[26]  E. Balint.  Memory and consciousness. , 1987, The International journal of psycho-analysis.

[27]  Jonathan W. Schooler,et al.  Memory for emotional events , 2000 .

[28]  Rachel J. Garoff-Eaton,et al.  Memory for Specific Visual Details can be Enhanced by Negative Arousing Content. , 2006 .

[29]  G. Rose,et al.  Evidence for a paradoxical sleep window for place learning in the Morris water maze , 1996, Physiology & Behavior.

[30]  Robert Stickgold,et al.  2.35 – The Role of Sleep in Memory Consolidation , 2008 .