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To nap or not to nap? Why napping habits interfere with cognitive fitness in ageing

Total Cost €


EC-Contrib. €






 COGNAP project word cloud

Explore the words cloud of the COGNAP project. It provides you a very rough idea of what is the project "COGNAP" about.

manifestation    time    reflects    fundamental    act    shape    rhythms    chronic    continuous    occurrence    implementable    lifespan    wakefulness    population    older    inadequately    stabilization    health    individuals    human    reduce    primarily    implication    dominant    period    neuroprotective    seniors    disruption    scientific    all    stands    decline    predict    sharp    intervention    diurnality    living    day    timed    cognitive    determinants    ageing    adult    data    prevention    nap    temporal    posit    organization    cognition    sleep    characterizing    area    programs    daytime    consolidated    associate    people    napping    contrary    re    link    prime    organisms    considering    fragmentation    explains    cognap    wake    individual    risk    belief    variability    inter    hypothesise    urgently    fitness    bout    night    breaking    epidemiological    rhythmicity    cognitively    visible    preliminary    ground    nervous    age    fast    function    circadian    span    lower    predicts    brain    society    protective   

Project "COGNAP" data sheet

The following table provides information about the project.


Organization address
address: PLACE DU 20 AOUT 7
city: LIEGE
postcode: 4000

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Belgium [BE]
 Total cost 1˙499˙125 €
 EC max contribution 1˙499˙125 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-STG
 Funding Scheme ERC-STG
 Starting year 2018
 Duration (year-month-day) from 2018-01-01   to  2022-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITE DE LIEGE BE (LIEGE) coordinator 1˙499˙125.00


 Project objective

All of us know of individuals who remain cognitively sharp at an advanced age. Identifying novel factors which associate with inter-individual variability in -and can be considered protective for- cognitive decline is a promising area in ageing research. Considering its strong implication in neuroprotective function, COGNAP predicts that variability in circadian rhythmicity explains a significant part of the age-related changes in human cognition. Circadian rhythms -one of the most fundamental processes of living organisms- are present throughout the nervous system and act on cognitive brain function. Circadian rhythms shape the temporal organization of sleep and wakefulness to achieve human diurnality, characterized by a consolidated bout of sleep during night-time and a continuous period of wakefulness during the day. Of prime importance is that the temporal organization of sleep and wakefulness evolves throughout the adult lifespan, leading to higher sleep-wake fragmentation with ageing. The increasing occurrence of daytime napping is the most visible manifestation of this fragmentation. Contrary to the common belief, napping stands as a health risk factor in seniors in epidemiological data. I posit that chronic napping in older people primarily reflects circadian disruption. Based on my preliminary findings, I predict that this disruption will lead to lower cognitive fitness. I further hypothesise that a re-stabilization of circadian sleep-wake organization through a nap prevention intervention will reduce age-related cognitive decline. Characterizing the link between cognitive ageing and the temporal distribution of sleep and wakefulness will not only bring ground-breaking advances at the scientific level, but is also timely in the ageing society. Cognitive decline, as well as inadequately timed sleep, represent dominant determinants of the health span of our fast ageing population and easy implementable intervention programs are urgently needed.


List of deliverables.
Data Management Plan Open Research Data Pilot 2019-06-06 16:04:32

Take a look to the deliverables list in detail:  detailed list of COGNAP deliverables.


year authors and title journal last update
List of publications.
2018 Schmidt, C.
Temporal constraints on sleep and cognition: importance for brain health during ageing.
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29
2018 Reyt, Mathilde; Latteur, Alizée; Schmidt, Christina; Muto, Vincenzo; Hammad, Grégory
La sieste comme indice de fragmentation du cycle de veille-sommeil : impact sur la cognition
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29
2018 Hammad, G., Muto, V., Gaggioni, G., Jaspar, M., Meyer, C., Maquet, P., Schmidt, C., Phillips, C., & Coppieters\'t Wallant, D.
New spectral analysis method to identify trait-like features in NREM sleep power spectra
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29
2018 Reyt, M., Latteur, A., Maire, M., Reichert, C., Cajochen, C., Schmidt, C., Muto, V., & Hammad, G.
Impact of age and napping on actimetry-derived sleep and 24-h rest-activity indices
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29
2017 Deantoni, Michele; Hammad, Grégory; Maire, Micheline; Ali Bahri, Mohammed; Berthomier, Christian; Cajochen, Christian; Reichert, Carolin; Schmidt, Christina
Association of circadian sleep-wake regulation and brain structure in older adults: a multi-modal approach
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29
2018 Muto, V., Berthomier, C., Schmidt, C., Vandewalle, G., Devillers, J., Chellappa, S., Meyer, C., Phillips, C., Berthomier, P., Prado,J. P., Benoit, O., Brandewinder, M., Mattout, J., & Maquet, P.
Inter- and intra-expert variability in sleep scoring: comparison between visual and automatic analysis.
published pages: , ISSN: , DOI:
Journal of Sleep Research 2019-08-29

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The information about "COGNAP" are provided by the European Opendata Portal: CORDIS opendata.

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