Please Scroll down for Article the Effects of Sleep on Episodic Memory in Older and Younger Adults

Evidence on sleep-dependent benefits for episodic memory remains elusive. Furthermore we know little about age-related changes on the effects of sleep on episodic memory. The study we report is the first to compare the effects of sleep on episodic memories in younger and older adults. Memories of stories and personal events were assessed following a retention interval that included sleep and following an equal duration of wakefulness. Both older and younger adults have superior memory following sleep compared to following wakefulness for both types of material. Amount of forgetting of personal events was less during wakefulness in older adults than in younger adults, possibly due to spontaneous rehearsal. Amount of time spent sleeping correlated highly with sleep benefit in older adults, suggesting that quantity of total sleep, and/or time spent in some stages of sleep, are important contributors to age-related differences in memory consolidation or protection from interference during sleep.

[1]  Richard B. Ivry,et al.  Sleep-Dependent Consolidation of Contextual Learning , 2006, Current Biology.

[2]  J. Born,et al.  Effects of Early and Late Nocturnal Sleep on Declarative and Procedural Memory , 1997, Journal of Cognitive Neuroscience.

[3]  J. Born,et al.  Declarative memory consolidation: mechanisms acting during human sleep. , 2004, Learning & memory.

[4]  Heidi Danker-Hopfe,et al.  Age-related changes in sleep and memory: commonalities and interrelationships , 2005, Experimental Gerontology.

[5]  H. Eichenbaum,et al.  The medial temporal lobe and recognition memory. , 2007, Annual review of neuroscience.

[6]  K. Nakayama,et al.  Sleep-dependent learning: a nap is as good as a night , 2003, Nature Neuroscience.

[7]  Daniel J Buysse,et al.  The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research , 1989, Psychiatry Research.

[8]  Jessica D. Payne,et al.  Sleep, dreams, and memory consolidation: the role of the stress hormone cortisol. , 2004, Learning & memory.

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

[10]  L. Carstensen,et al.  The salience of emotion across the adult life span. , 1994, Psychology and aging.

[11]  B. Ekstrand,et al.  Effect of sleep on memory. II. Differential effect of the first and second half of the night. , 1971, Journal of experimental psychology.

[12]  Matthew P Walker,et al.  A refined model of sleep and the time course of memory formation. , 2005, The Behavioral and brain sciences.

[13]  Jan Born,et al.  Midlife decline in declarative memory consolidation is correlated with a decline in slow wave sleep. , 2007, Learning & memory.

[14]  Joel L. Voss,et al.  Memory reactivation and consolidation during sleep. , 2004, Learning & memory (Cold Spring Harbor, N.Y.).

[15]  Michael Meaney,et al.  Cortisol levels during human aging predict hippocampal atrophy and memory deficits , 1998, Nature Neuroscience.

[16]  N. Porter,et al.  Stress hormones and brain aging: adding injury to insult? , 1998, Nature Neuroscience.

[17]  R. Stickgold,et al.  Sleep and the time course of motor skill learning. , 2003, Learning & memory.

[18]  Richard B Ivry,et al.  Age-related decline of sleep-dependent consolidation. , 2007, Learning & memory.

[19]  B. Ekstrand.  Effect of sleep on memory. , 1967, Journal of experimental psychology.

[20]  B W Ellis,et al.  The St. Mary's Hospital sleep questionnaire: a study of reliability. , 1981, Sleep.

[21]  R. Stickgold,et al.  Practice with Sleep Makes Perfect Sleep-Dependent Motor Skill Learning , 2002, Neuron.

[22]  Lynn Hasher,et al.  Truth and Character: Sources That Older Adults Can Remember , 2002, Psychological science.

[23]  E. van Cauter,et al.  Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol levels in healthy men. , 2000, JAMA.

[24]  Marc Baltzan,et al.  Sleep and aging: 1. Sleep disorders commonly found in older people , 2007, Canadian Medical Association Journal.

[25]  A. Convit,et al.  Cortisol levels during human aging predict hippocampal atrophy and memory deficits , 1998, Nature Neuroscience.