Reduced sleep-associated consolidation of declarative memory in attention-deficit/hyperactivity disorder

Alexander Prehn-Kristensen*, Robert Göder, Jochen Fischer, Ines Wilhelm, Mareen Seeck-Hirschner, Josef Aldenhoff, Lioba Baving

*Korrespondierende/r Autor/-in für diese Arbeit
    65 Zitate (Scopus)

    Abstract

    Objective: Sleep supports the consolidation of declarative memory. Patients with attention-deficit/hyperactivity disorder (ADHD) are not only characterized by sleep problems but also by declarative memory deficits. Given that the consolidation of declarative memory during sleep is supported by slow oscillations, which are predominantly generated by the prefrontal cortex, and that ADHD patients display low prefrontal brain activity, we assumed that ADHD patients show reduced sleep-associated consolidation of declarative memory. Methods: The impact of sleep on the consolidation of declarative memory was examined with a picture recognition task. Twelve ADHD patients (10-16. years) and 12 healthy controls participated in two experimental conditions: in the sleep condition, learning was performed in the evening and picture recognition was tested after nocturnal sleep; in the wake condition, learning was conducted in the morning while retrieval took place after a day of wakefulness. Results: Analyses of recognition accuracy revealed reduced sleep-associated enhancement of recognition accuracy in ADHD. While sleep-associated enhancement of recognition accuracy was correlated with slow oscillation power during non-REM sleep in healthy controls, no such correlations were observed in ADHD. Conclusions: These data indicate a deficit in sleep-associated consolidation of declarative memory in ADHD. Moreover, our results suggest reduced functionality of slow oscillations in sleep-associated consolidation of declarative memory in ADHD.

    OriginalspracheEnglisch
    ZeitschriftSleep Medicine
    Jahrgang12
    Ausgabenummer7
    Seiten (von - bis)672-679
    Seitenumfang8
    ISSN1389-9457
    DOIs
    PublikationsstatusVeröffentlicht - 08.2011

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