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Giulia Gaggioni
University of Liège
Circadian rhythmPsychologyNeuroscienceSleep deprivationWakefulness
47Publications
6H-index
207Citations
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Publications 46
Newest
#1Paolo Cardone (University of Liège)
#2Maxime Van Egroo (University of Liège)H-Index: 2
Last. Gilles Vandewalle (University of Liège)H-Index: 38
view all 6 authors...
Modern lifestyle curtails sleep and increases nighttime work and leisure activities. This has a deleterious impact on vigilance and attention, exacerbating chances of committing attentional lapses, with potential dramatic outcomes. A full characterization of the brain mechanisms associated with lapses is still lacking. Here, we investigated the brain signature of attentional lapses and assessed whether cortical excitability and brain response propagation were modified during lapses and whether t...
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#2Vincenzo Muto (University of Liège)H-Index: 11
Last. Christophe Phillips (University of Liège)H-Index: 54
view all 18 authors...
Sleep studies face new challenges in terms of data, objectives and metrics. This requires reappraising the adequacy of existing analysis methods, including scoring methods. Visual and automatic sleep scoring of healthy individuals were compared in terms of reliability (i.e., accuracy and stability) to find a scoring method capable of giving access to the actual data variability without adding exogenous variability. A first dataset (DS1, four recordings) scored by six experts plus an autoscoring ...
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#1Maxime Van Egroo (University of Liège)H-Index: 2
#2Justinas Narbutas (University of Liège)H-Index: 2
Last. Gilles Vandewalle (University of Liège)H-Index: 38
view all 22 authors...
Age-related cognitive decline arises from alterations in brain structure as well as in sleep-wake regulation. Here, we investigated whether preserved wake-dependent regulation of cortical function could represent a positive factor for cognitive fitness in aging. We quantified cortical excitability dynamics during prolonged wakefulness as a sensitive marker of age-related alteration in sleep-wake regulation in 60 healthy older individuals (50–69 y; 42 women). Brain structural integrity was assess...
1 CitationsSource
#1Giulia Gaggioni (University of Liège)H-Index: 6
view all 5 authors...
#1Giulia Gaggioni (University of Liège)H-Index: 6
#2Julien Q. M. Ly (University of Liège)H-Index: 4
Last. Gilles Vandewalle (University of Liège)H-Index: 38
view all 19 authors...
Abstract Cortical excitability depends on sleep-wake regulation, is central to cognition, and has been implicated in age-related cognitive decline. The dynamics of cortical excitability during prolonged wakefulness in aging are unknown, however. Here, we repeatedly probed cortical excitability of the frontal cortex using transcranial magnetic stimulation and electroencephalography in 13 young and 12 older healthy participants during sleep deprivation. Although overall cortical excitability did n...
1 CitationsSource
#1Maxime Van EgrooH-Index: 2
#2Giulia GaggioniH-Index: 6
Last. Gilles VandewalleH-Index: 38
view all 5 authors...
Pupil size informs about sympathovagal balance as well as cognitive and affective processes, and perception. It is also directly linked to phasic activity of the brainstem locus coeruleus, so that pupil measures have gained recent attention. Steady-state pupil size and its variability have been directly linked to sleep homeostasis and circadian phase, but results have been inconsistent. Here, we report robust changes in steady-state pupil size during 29 h of continuous wakefulness in healthy you...
1 CitationsSource
#1Giulia Gaggioni (University of Liège)H-Index: 6
view all 5 authors...
#1Vincenzo Muto (University of Liège)H-Index: 11
Last. Pierre Maquet (University of Liège)H-Index: 80
view all 17 authors...
Abstract Study Objectives New challenges in sleep science require to describe fine grain phenomena or to deal with large datasets. Beside the human resource challenge of scoring huge datasets, the inter- and intra-expert variability may also reduce the sensitivity of such studies. Searching for a way to disentangle the variability induced by the scoring method from the actual variability in the data, visual and automatic sleep scorings of healthy individuals were examined. Methods A first datase...
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#1Paolo Cardone (University of Liège)
#2Giulia Gaggioni (University of Liège)H-Index: 6
Last. Ly JulienH-Index: 1
view all 12 authors...
#1Grégory Hammad (University of Liège)
#2Vincenzo Muto (University of Liège)H-Index: 11
Last. Dorothe Coppieters't Wallant (University of Liège)H-Index: 1
view all 9 authors...
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