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

The '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 a...

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Principais autores: Mota, Natália Bezerra, Soares, Ernesto Saias, Altszyler, Edgar, Sánchez-Gendriz, Ignacio, Muto, Vincenzo, Heib, Dominik, Slezak, Diego F., Sigman, Mariano, Copelli, Mauro, Schabus, Manuel, Ribeiro, Sidarta Tollendal Gomes
Formato: article
Idioma:English
Publicado em: Elsevier BV
Assuntos:
Dream
Hypnagogic sleep
Memory reverberation
Natural language processing
Semantic distance
Endereço do item:https://repositorio.ufrn.br/handle/123456789/49608
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spelling ri-123456789-496082022-10-20T13:10:04Z Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm Mota, Natália Bezerra Soares, Ernesto Saias Altszyler, Edgar Sánchez-Gendriz, Ignacio Muto, Vincenzo Heib, Dominik Slezak, Diego F. Sigman, Mariano Copelli, Mauro Schabus, Manuel Ribeiro, Sidarta Tollendal Gomes Dream Hypnagogic sleep Memory reverberation Natural language processing Semantic distance The '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 rhythm 2022-10-20T13:10:03Z 2022-10-20T13:10:03Z 2022-10 article MOTA, 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. https://repositorio.ufrn.br/handle/123456789/49608 10.1016/j.neuroimage.2022.119690 en Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Elsevier BV
institution Repositório Institucional
collection RI - UFRN
language English
topic Dream
Hypnagogic sleep
Memory reverberation
Natural language processing
Semantic distance
spellingShingle Dream
Hypnagogic sleep
Memory reverberation
Natural language processing
Semantic distance
Mota, Natália Bezerra
Soares, Ernesto Saias
Altszyler, Edgar
Sánchez-Gendriz, Ignacio
Muto, Vincenzo
Heib, Dominik
Slezak, Diego F.
Sigman, Mariano
Copelli, Mauro
Schabus, Manuel
Ribeiro, Sidarta Tollendal Gomes
Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
description The '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 rhythm
format article
author Mota, Natália Bezerra
Soares, Ernesto Saias
Altszyler, Edgar
Sánchez-Gendriz, Ignacio
Muto, Vincenzo
Heib, Dominik
Slezak, Diego F.
Sigman, Mariano
Copelli, Mauro
Schabus, Manuel
Ribeiro, Sidarta Tollendal Gomes
author_facet Mota, Natália Bezerra
Soares, Ernesto Saias
Altszyler, Edgar
Sánchez-Gendriz, Ignacio
Muto, Vincenzo
Heib, Dominik
Slezak, Diego F.
Sigman, Mariano
Copelli, Mauro
Schabus, Manuel
Ribeiro, Sidarta Tollendal Gomes
author_sort Mota, Natália Bezerra
title Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
title_short Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
title_full Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
title_fullStr Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
title_full_unstemmed Imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
title_sort imagetic and affective measures of memory reverberation diverge at sleep onset in association with theta rhythm
publisher Elsevier BV
publishDate 2022
url https://repositorio.ufrn.br/handle/123456789/49608
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