Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Opposite effect of motivated forgetting on sleep spindles during stage 2 and slow wave sleep

Abstract : Memories selectively benefit from sleep. In addition to the importance of the consolidation of relevant memories, the capacity to forget unwanted memories is also crucial. We investigated the effect of suppressing unwanted memories on electroencephalography activity of subsequent sleep using a motivated forgetting (MF) paradigm as compared with a control non-forgetting task. Subjects were randomly assigned to nap or no-nap groups. We used a modified version of the think/no-think paradigm with dominant number of no-think words cued to be forgotten and included only subjects capable of suppressing unwanted memories by performing an initial subject inclusion experiment. In both groups and conditions, the performance of the subjects in recalling the word pairs learned in the beginning of the day was evaluated in a final recall test. We found that both nap and no-nap groups recalled significantly less no-think words in the MF condition compared to the control condition. Moreover, for the nap group, in the MF compared to the control condition, spindle power and density increased during stage 2 (S2) whereas they decreased during slow wave sleep (SWS). Interestingly, recall performance of no-think words was negatively correlated with spindle power during S2 whereas it was positively correlated with spindle power during SWS. These results indicate that sleep spindles are sensitive to the previous MF experiences and suggest a differential role of sleep spindles during S2 and SWS in memory processing during sleep.
Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : Louise DESSAIVRE Connectez-vous pour contacter le contributeur
Soumis le : jeudi 10 mars 2022 - 14:47:07
Dernière modification le : mardi 6 septembre 2022 - 16:22:46

Lien texte intégral



Fereshteh Dehnavi, Sahar Moghimi, Shima Sadrabadi Haghighi, Mostafa Safaie, Maryam Ghorbani. Opposite effect of motivated forgetting on sleep spindles during stage 2 and slow wave sleep. SLEEP, Oxford University Press 2019, 42 (7), ⟨10.1093/sleep/zsz085⟩. ⟨hal-03604517⟩



Consultations de la notice