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The Evolution of Memories Across Wake and Sleep

24. juli 2021 oppdatert 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.

Studieoversikt

Status

Aktiv, ikke rekrutterende

Forhold

Intervensjon / Behandling

Detaljert 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

Studietype

Intervensjonell

Registrering (Forventet)

1650

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Forente stater
    • Massachusetts
      • Boston, Massachusetts, Forente stater, 02215
        • Robert Stickgold

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 40 år (Voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Ingen inngripen: Daytime Wake
Subjects are trained and retested during a single period of daytime wake
Ingen inngripen: Overnight sleep
Subjects are trained on one day and tested the next day, after a night of normal sleep
Eksperimentell: Sleep deprivation
Subjects are trained on one day and tested the next day, after a night of sleep deprivation
Atferdsmessig: Sleep deprivation
Subjects are kept awake all night.
Eksperimentell: Dagslur
Forsøkspersonene trenes og testes deretter på nytt etter en lur på dagtid
Atferdsmessig: Nap
Participants are given a 90-minute nap opportunity in the early afternoon.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
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
Tiltaksbeskrivelse
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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Beth Israel Deaconess Medical Center

Samarbeidspartnere

National Institute of Mental Health (NIMH)

Etterforskere

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

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

1. mars 2016

Primær fullføring (Forventet)

20. juni 2022

Studiet fullført (Forventet)

20. desember 2023

Datoer for studieregistrering

Først innsendt

19. juli 2017

Først innsendt som oppfylte QC-kriteriene

21. juli 2017

Først lagt ut (Faktiske)

24. juli 2017

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

30. juli 2021

Siste oppdatering sendt inn som oppfylte QC-kriteriene

24. juli 2021

Sist bekreftet

1. juli 2021

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

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

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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