Variability of sleep parameters across multiple laboratory sessions in healthy young subjects: The “very first night effect”

Lorenzo, José Luis López; Barbanoj, M.J.

doi:10.1111/1469-8986.3940409

Cited by 87 publications

(28 citation statements)

References 11 publications

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“…Our results corroborate data from other laboratories using nondepressed subjects who report lower sleep efficiency, increased wakefulness, less REM and NREM sleep, and longer latencies to sleep onset and REM sleep on the first night (Agnew et al, 1966;Curcio et al, 2004;Lorenzo and Barbanoj, 2002;Mendels and Hawkins, 1967;Schmidt and Kaelbling, 1971;Tamaki et al, 2005;Toussaint et al, 1995;Webb and Campbell, 1979). However, our data contrast with a few studies that failed to find multiple first-night disruptive effects (Browman and Cartwright, 1980;Coble et al, 1974;Kader and Griffin, 1983).…”

Section: Gender Differences In Polysomnographic Sleepsupporting

confidence: 90%

Gender Differences in Polysomnographic Sleep in Young Healthy Sleepers

Goel

Kim

Lao

2005

Chronobiology International

120

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Middle-aged and elderly populations exhibit gender differences in polysomnographic (PSG) sleep; however, whether young men and women also show such differences remains unclear. Thirty-one young healthy sleepers (16 men and 15 women, aged 18 to 30 yr, mean+/-SD, 20.5+/-2.4 yr) completed 3 consecutive overnight sessions in a sleep laboratory, after maintaining a stable sleep-wake cycle for 1 wk before study entry. Standard PSG sleep and self-rated sleepiness data were collected each night. Across nights, women showed better sleep quality than men: they fell asleep faster (shorter sleep onset latency) and had better sleep efficiency, with more time asleep and less time awake (all differences showed large effect sizes, d=0.98 to 1.12). By contrast, men were sleepier than women across nights. Both men and women demonstrated poorer overall sleep quality on the first night compared with the subsequent 2 nights of study. We conclude young adult healthy sleepers show robust gender differences in PSG sleep, like older populations, with better sleep quality in women than in men. These results highlight the importance of gender in sleep and circadian rhythm research studies employing young subjects and have broader implications for women's health issues relating to these topics.

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Section: Gender Differences In Polysomnographic Sleepsupporting

confidence: 90%

Gender Differences in Polysomnographic Sleep in Young Healthy Sleepers

Goel

Kim

Lao

2005

Chronobiology International

120

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“…[ (Ohayon et al 2004;Carskadon and Dement 2011), except for a small increase in stage 1 which is typical of laboratory studies (Lorenzo and Barbanoj 2002).…”

Section: Behavioural Performancementioning

confidence: 94%

Cross-modal transfer of statistical information benefits from sleep

Durrant

Cairney

Lewis

2016

Cortex

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Extracting regularities from a sequence of events is essential for understanding our environment. However, there is no consensus regarding the extent to which such regularities can be generalised beyond the modality of learning. One reason for this could be the variation in consolidation intervals used in different paradigms, also including an opportunity to sleep. Using a novel statistical learning paradigm in which structured information is acquired in the auditory domain and tested in the visual domain over either 30min or 24hr consolidation intervals, we show that cross-modal transfer can occur, but this transfer is only seen in the 24hr group. Importantly, the extent of cross-modal transfer is predicted by the amount of SWS obtained. Additionally, cross-modal transfer is associated with the same pattern of decreasing MTL and increasing striatal involvement which has previously been observed to occur across 24 hours in unimodal statistical learning. We also observed enhanced functional connectivity after 24 hours in a network of areas which have been implicated in cross-modal integration including the precuneus and the middle occipital gyrus. Finally, functional connectivity between the striatum and the precuneus was also enhanced, and this strengthening was predicted by SWS. These results demonstrate that statistical learning can generalise to some extent beyond the modality of acquisition, and together with our previously published unimodal results, support the notion that statistical learning is both domain-general and domain-specific.

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“…Polysomnography showed that participants slept very efficiently in the sleep lab (M=92.6%, SEM=1.56%), and exhibited a typical hypnogram (Lorenzo & Barbanoj, 2002) with 11.6% (± 1.56% SEM) N1 sleep, 42.3% (± 1.88% SEM) N2 sleep, 26.1% (± 0.96% SEM) N2 sleep, and 20.5% (± 0.88% SEM) REM sleep.…”

Section: Sleep Parametersmentioning

confidence: 99%

Schema-conformant memories are preferentially consolidated during REM sleep

Durrant

Cairney

McDermott

et al. 2015

Neurobiology of Learning and Memory

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Please cite this article as: Durrant, S.J., Cairney, S.A., McDermott, C., Lewis, P.A., Schema-Conformant Memories are Preferentially Consolidated During REM Sleep, Neurobiology of Learning and Memory (2015), doi: http:// dx.doi.org/10.1016/j.nlm. 2015.02.011 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractMemory consolidation is most commonly described by the standard model, which proposes an initial binding role for the hippocampus which diminishes over time as intracortical connections are strengthened. Recent evidence suggests that slow wave sleep (SWS) plays an essential role in this process. Existing animal and human studies have suggested that memories which fit tightly into an existing knowledge framework or schema might use an alternative consolidation route in which the medial prefrontal cortex takes on the binding role. In this study we sought to investigate the role of sleep in this process using a novel melodic memory task. Participants were asked to remember 32 melodies, half of which conformed to a tonal schema present in all enculturated listeners, and half of which did not fit with this schema. After a 24-hour consolidation interval, participants were asked to remember a further 32 melodies, before being given a recognition test in which melodies from both sessions were presented alongside some previously unheard foils. Participants remembered schema-conformant melodies better than non-conformant ones. This was much more strongly the case for consolidated melodies, suggesting that consolidation over a 24-hour period preferentially consolidated schema-conformant items. Overnight sleep was monitored between the sessions, and the extent of the consolidation benefit for schema-conformant items was associated with both the amount of REM sleep obtained and EEG theta power in frontal and central regions during REM sleep. Overall our data suggest that REM sleep plays a crucial role in the rapid consolidation of schemaconformant items. This finding is consistent with previous results from animal studies and the SLIMM model of van Kesteren et al (2012), and suggest that REM sleep, rather than SWS, may be involved in an alternative pathway of consolidation for schema-conformant memories.

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Variability of sleep parameters across multiple laboratory sessions in healthy young subjects: The “very first night effect”

Cited by 87 publications

References 11 publications

Gender Differences in Polysomnographic Sleep in Young Healthy Sleepers

Gender Differences in Polysomnographic Sleep in Young Healthy Sleepers

Cross-modal transfer of statistical information benefits from sleep

Schema-conformant memories are preferentially consolidated during REM sleep

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