title: The relation between EEG prefrontal asymmetry and subjective feelings of mood following 24 hours of sleep deprivation.
abstract: Several studies have investigated the relationship between asymmetrical EEG activity over the frontal cortex and mood. This study aimed at investigating the association between state fluctuations in frontal alpha EEG asymmetry and state changes followed by 24 h of sleep deprivation (SD). Our results show that sleep deprivation caused a significant alteration in the asymmetry values. Activation shifted from the left hemisphere, before SD, to the right hemisphere, after SD, in all frontal electrode pairs. In addition, according to the self-rating scale of SD-related mood effects, subjects became significantly less alerted and active, and sleepier. According to these results, increased right prefrontal activation might be potentially associated with the negative mood states typically seen after sleep deprivation, although the causal relationship is still uncertain. However, more studies will be necessary to establish the viability of EEG asymmetry and the cerebral lateralization hypothesis to explain the SD-related affective changes.
authors.affiliation: Laboratório de Mapeamento Cerebral e Integração Sensório-Motora, Instituto de Psiquiatria, Universidade Federal do Rio de Janeiro, Rua Delfina 47/104, 20511-270 Rio de Janeiro RJ, Brazil. camilaferreira@libero.it
authors.forename: Camila
authors.initials: C
authors.lastname: Ferreira
authors.forename: Andréa
authors.initials: A
authors.lastname: Deslandes
authors.forename: Helena
authors.initials: H
authors.lastname: Moraes
authors.forename: Maurício
authors.initials: M
authors.lastname: Cagy
authors.forename: Luiz Fernando
authors.initials: LF
authors.lastname: Basile
authors.forename: Roberto
authors.initials: R
authors.lastname: Piedade
authors.forename: Pedro
authors.initials: P
authors.lastname: Ribeiro
mesh_terms: D000328:Adult; D000339:Affect / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D005625:Frontal Lobe / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D012892:Sleep Deprivation / Q000503:physiopathology*; D013997:Time Factors