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The Evolution of Memories Across Wake and Sleep

24 juli 2021 uppdaterad av: Robert Stickgold, Beth Israel Deaconess Medical Center
To further understanding of the relationship between sleep and memory the investigators will address and attempt to answer three questions, (1) how memories evolve across wake and sleep, (2) how different aspects of this memory evolution are reflected both behaviorally and in the EEG signal, and (3) what stages and features of sleep affect memory evolution. Together, these studies will provide a greater breadth and depth of knowledge concerning sleep's role in memory consolidation. Such knowledge would be of practical importance for educational practices, whether in schools, on the job, or in the military, and would also provide valuable information to the fields of sleep medicine and psychiatry, where interactions between sleep disorders and cognitive functioning are of great importance.

Studieöversikt

Status

Aktiv, inte rekryterande

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Goal 1: How do memories evolve across wake and sleep? The investigators are interested in how specific memories are selected for change across periods of wake and sleep, and in characterizing the manner in which those memories change. There has been research into broad areas of memory, such as procedural and declarative memory, but other forms of memory, such as semantic memory, remain unexplored, as well as different subtypes of memory within these broad areas. Additionally, it is presently unknown how memories are selected for subsequent processing during sleep and wake. The investigators aim to characterize which memories change, how they are selected, and how they change differently over periods that include sleep versus periods during which participants remain awake.

Goal 2: How are these changes reflected behaviorally and in the EEG signal? The investigators will employ and develop specific behavioral and electrophysiological tasks and measures that allow one to probe the state of a particular type of memory and determine how it changes over periods of wake and sleep. EEG signals may be informative about the status of a memory during behavioral performance as well as during both waking and sleeping offline states.

Goal 3: What stages and features of sleep affect memory evolution? In the cases in which sleep in particular is found or suspected to influence memories in a unique way, the investigators will assess which stages and features of sleep are involved in that evolution. Generally, this will be accomplished by correlating measures such as time spent in a sleep stage, prominence of particular brain oscillations, or density of spindles with changes in behavior or in other EEG metrics

Studietyp

Interventionell

Inskrivning (Förväntat)

1650

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • Massachusetts
      • Boston, Massachusetts, Förenta staterna, 02215
        • Robert Stickgold

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 40 år (Vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • willing and able to follow the protocol
  • willing to refrain from alcohol and recreational drugs for the duration of the protocol
  • in some cases, English as a first language, normal hearing, and/or normal or corrected to normal vision is required

Exclusion Criteria:

  • self-reported sleep disturbances
  • a history of mental illness
  • the use of any drugs that could affect either sleep or cognitive functioning (e.g., sleeping pills or antidepressants)

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Grundläggande vetenskap
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Inget ingripande: Daytime Wake
Subjects are trained and retested during a single period of daytime wake
Inget ingripande: Overnight sleep
Subjects are trained on one day and tested the next day, after a night of normal sleep
Experimentell: Sleep deprivation
Subjects are trained on one day and tested the next day, after a night of sleep deprivation
Beteende: Sleep deprivation
Subjects are kept awake all night.
Experimentell: Dagtupp
Försökspersonerna tränas och testas sedan igen efter en tupplur på dagen
Beteende: Nap
Participants are given a 90-minute nap opportunity in the early afternoon.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Motor sequence task improvement
Tidsram: 4-24 hrs
The increase in the number of correct sequences typed, from the last three training trials to the first three delayed-test trials, is calculated as a percent improvement.
4-24 hrs
Psychomotor vigilance task lapse rate
Tidsram: 4-24 hrs
The absolute number of trials in a 5-min test period on which the participant fails to responds with 500ms is calculated as the lapse rate.
4-24 hrs
Serial reaction time test improvement
Tidsram: 4-24 hrs
At two time points, separated by a period of wake or sleep, the average reaction time to stimuli in repeated sequence blocks is subtracted from the average reaction time in random blocks. The percent increase in this difference, from the final blocks in the first test to the first blocks in the second test, is calculated as a percent improvement.
4-24 hrs
Visual discrimination task improvement
Tidsram: 4-24 hrs
At two time points, separated by a period of wake or sleep, the interpolated stimulus-mask ISI corresponding to 80% accuracy on the texture discrimination task is determined, and task improvement is calculated as the difference between these thresholds, in ms.
4-24 hrs

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Sleep architecture (absolute times)
Tidsram: 4-24 hrs
Sleep is recorded with standard polysomnography and the amount of time spent in each wake and sleep stage calculated.
4-24 hrs
Sleep architecture (percent times)
Tidsram: 4-24 hrs
The percent of total sleep time spent in each sleep stage is calculated.
4-24 hrs
Spindle
Tidsram: 4-24 hrs
The density of sleep spindles per minute of N2 sleep is calculated.
4-24 hrs
Sleep microstructure
Tidsram: 4-24 hrs
The EEG spectral power is calculated for N2 and N3 sleep.
4-24 hrs

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Beth Israel Deaconess Medical Center

Samarbetspartners

National Institute of Mental Health (NIMH)

Utredare

  • Huvudutredare: Robert Stickgold, PhD, Beth Israel Deaconess Medical Center

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

1 mars 2016

Primärt slutförande (Förväntat)

20 juni 2022

Avslutad studie (Förväntat)

20 december 2023

Studieregistreringsdatum

Först inskickad

19 juli 2017

Först inskickad som uppfyllde QC-kriterierna

21 juli 2017

Första postat (Faktisk)

24 juli 2017

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

30 juli 2021

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

24 juli 2021

Senast verifierad

1 juli 2021

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 2016P000222
  • 5R01MH048832-23 (U.S.S. NIH-anslag/kontrakt)

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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