Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm

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dc.contributor.authorMota, Natália Bezerra
dc.contributor.authorSoares, Ernesto Saias
dc.contributor.authorAltszyler, Edgar
dc.contributor.authorSánchez-Gendriz, Ignacio
dc.contributor.authorMuto, Vincenzo
dc.contributor.authorHeib, Dominik
dc.contributor.authorSlezak, Diego F.
dc.contributor.authorSigman, Mariano
dc.contributor.authorCopelli, Mauro
dc.contributor.authorSchabus, Manuel
dc.contributor.authorRibeiro, Sidarta Tollendal Gomes
dc.date.accessioned2022-10-20T13:10:03Z
dc.date.available2022-10-20T13:10:03Z
dc.date.issued2022-10
dc.description.resumoThe 'day residue' - the presence of waking memories into dreams - is a century-old concept that remains controversial in neuroscience. Even at the psychological level, it remains unclear how waking imagery cedes into dreams. Are visual and affective residues enhanced, modified, or erased at sleep onset? Are they linked, or dissociated? What are the neural correlates of these transformations? To address these questions we combined quantitative semantics, sleep EEG markers, visual stimulation, and multiple awakenings to investigate visual and affect residues in hypnagogic imagery at sleep onset. Healthy adults were repeatedly stimulated with an affective image, allowed to sleep and awoken seconds to minutes later, during waking (WK), N1 or N2 sleep stages. 'Image Residue' was objectively defined as the formal semantic similarity between oral reports describing the last image visualized before closing the eyes ('ground'), and oral reports of subsequent visual imagery ('hypnagogic imagery). Similarly, 'Affect Residue' measured the proximity of affective valences between 'ground' and 'hypnagogic imagery'. We then compared these grounded measures of two distinct aspects of the 'day residue', calculated within participants, to randomly generated values calculated across participants. The results show that Image Residue persisted throughout the transition to sleep, increasing during N1 in proportion to the time spent in this stage. In contrast, the Affect Residue was gradually neutralized as sleep progressed, decreasing in proportion to the time spent in N1 and reaching a minimum during N2. EEG power in the theta band (4.5-6.5 Hz) was inversely correlated with the Image Residue during N1. The results show that the visual and affective aspects of the 'day residue' in hypnagogic imagery diverge at sleep onset, possibly decoupling visual contents from strong negative emotions, in association with increased theta rhythmpt_BR
dc.identifier.citationMOTA, Natália Bezerra; SOARES, Ernesto; ALTSZYLER, Edgar; SÁNCHEZ-GENDRIZ, Ignacio; MUTO, Vincenzo; HEIB, Dominik; SLEZAK, Diego F.; SIGMAN, Mariano; COPELLI, Mauro; SCHABUS, Manuel; RIBEIRO, Sidarta. Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm. Neuroimage, [S. l.], p. 119690, out. 2022. Doi: http://dx.doi.org/10.1016/j.neuroimage.2022.119690. Disponível em: https://www.sciencedirect.com/science/article/pii/S1053811922008114. Acesso em: 20 out. 2022.pt_BR
dc.identifier.doi10.1016/j.neuroimage.2022.119690
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/49608
dc.languageenpt_BR
dc.publisherElsevier BVpt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectDreampt_BR
dc.subjectHypnagogic sleeppt_BR
dc.subjectMemory reverberationpt_BR
dc.subjectNatural language processingpt_BR
dc.subjectSemantic distancept_BR
dc.titleImagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythmpt_BR
dc.typearticlept_BR

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