EEG Σ and slow-wave activity during NREM sleep correlate with overnight declarative and procedural memory consolidation.
J Sleep Res
; 21(6): 612-9, 2012 Dec.
Article
em En
| MEDLINE
| ID: mdl-22591117
ABSTRACT
Previous studies suggest that sleep-specific brain activity patterns such as sleep spindles and electroencephalographic slow-wave activity contribute to the consolidation of novel memories. The generation of both sleep spindles and slow-wave activity relies on synchronized oscillations in a thalamo-cortical network that might be implicated in synaptic strengthening (spindles) and downscaling (slow-wave activity) during sleep. This study further examined the association between electroencephalographic power during non-rapid eye movement sleep in the spindle (sigma, 12-16 Hz) and slow-wave frequency range (0.1-3.5 Hz) and overnight memory consolidation in 20 healthy subjects (10 men, 27.1 ± 4.6 years). We found that both electroencephalographic sigma power and slow-wave activity were positively correlated with the pre-post-sleep consolidation of declarative (word list) and procedural (mirror-tracing) memories. These results, although only correlative in nature, are consistent with the view that processes of synaptic strengthening (sleep spindles) and synaptic downscaling (slow-wave activity) might act in concert to promote synaptic plasticity and the consolidation of both declarative and procedural memories during sleep.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sono
/
Encéfalo
/
Eletroencefalografia
/
Memória
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Sleep Res
Assunto da revista:
PSICOFISIOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Alemanha