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The Evolution of Memories Across Wake and Sleep

24. juli 2021 opdateret af: 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.

Studieoversigt

Status

Aktiv, ikke rekrutterende

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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

Undersøgelsestype

Interventionel

Tilmelding (Forventet)

1650

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Massachusetts
      • Boston, Massachusetts, Forenede Stater, 02215
        • Robert Stickgold

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 40 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Ingen indgriben: Daytime Wake
Subjects are trained and retested during a single period of daytime wake
Ingen indgriben: Overnight sleep
Subjects are trained on one day and tested the next day, after a night of normal sleep
Eksperimentel: Sleep deprivation
Subjects are trained on one day and tested the next day, after a night of sleep deprivation
Adfærdsmæssigt: Sleep deprivation
Subjects are kept awake all night.
Eksperimentel: Dagslur
Forsøgspersonerne trænes og testes derefter igen efter en lur i dagtimerne
Adfærdsmæssigt: Nap
Participants are given a 90-minute nap opportunity in the early afternoon.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Motor sequence task improvement
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Sleep architecture (absolute times)
Tidsramme: 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)
Tidsramme: 4-24 hrs
The percent of total sleep time spent in each sleep stage is calculated.
4-24 hrs
Spindle
Tidsramme: 4-24 hrs
The density of sleep spindles per minute of N2 sleep is calculated.
4-24 hrs
Sleep microstructure
Tidsramme: 4-24 hrs
The EEG spectral power is calculated for N2 and N3 sleep.
4-24 hrs

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Beth Israel Deaconess Medical Center

Samarbejdspartnere

National Institute of Mental Health (NIMH)

Efterforskere

  • Ledende efterforsker: Robert Stickgold, PhD, Beth Israel Deaconess Medical Center

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. marts 2016

Primær færdiggørelse (Forventet)

20. juni 2022

Studieafslutning (Forventet)

20. december 2023

Datoer for studieregistrering

Først indsendt

19. juli 2017

Først indsendt, der opfyldte QC-kriterier

21. juli 2017

Først opslået (Faktiske)

24. juli 2017

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. juli 2021

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

24. juli 2021

Sidst verificeret

1. juli 2021

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

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

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Søvn

Kliniske forsøg med Sleep deprivation

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Sponsorer og samarbejdspartnere

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Betingelser

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Kosttilskud

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Placeringer

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