Title |
Working Memory Is Partially Preserved during Sleep
|
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Published in |
PLOS ONE, December 2012
|
DOI | 10.1371/journal.pone.0050997 |
Pubmed ID | |
Authors |
Jérôme Daltrozzo, Léa Claude, Barbara Tillmann, Hélène Bastuji, Fabien Perrin |
Abstract |
Although several cognitive processes, including speech processing, have been studied during sleep, working memory (WM) has never been explored up to now. Our study assessed the capacity of WM by testing speech perception when the level of background noise and the sentential semantic length (SSL) (amount of semantic information required to perceive the incongruence of a sentence) were modulated. Speech perception was explored with the N400 component of the event-related potentials recorded to sentence final words (50% semantically congruent with the sentence, 50% semantically incongruent). During sleep stage 2 and paradoxical sleep: (1) without noise, a larger N400 was observed for (short and long SSL) sentences ending with a semantically incongruent word compared to a congruent word (i.e. an N400 effect); (2) with moderate noise, the N400 effect (observed at wake with short and long SSL sentences) was attenuated for long SSL sentences. Our results suggest that WM for linguistic information is partially preserved during sleep with a smaller capacity compared to wake. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Sweden | 1 | 20% |
United States | 1 | 20% |
Unknown | 3 | 60% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 5 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Colombia | 1 | 1% |
Italy | 1 | 1% |
Uruguay | 1 | 1% |
United Kingdom | 1 | 1% |
Canada | 1 | 1% |
Japan | 1 | 1% |
Unknown | 71 | 92% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 16 | 21% |
Student > Master | 12 | 16% |
Student > Postgraduate | 7 | 9% |
Researcher | 6 | 8% |
Student > Doctoral Student | 5 | 6% |
Other | 10 | 13% |
Unknown | 21 | 27% |
Readers by discipline | Count | As % |
---|---|---|
Psychology | 16 | 21% |
Medicine and Dentistry | 9 | 12% |
Neuroscience | 9 | 12% |
Agricultural and Biological Sciences | 7 | 9% |
Linguistics | 3 | 4% |
Other | 10 | 13% |
Unknown | 23 | 30% |