The Evolution of Memories Across Wake and Sleep
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
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
Type d'étude
Inscription (Anticipé)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Massachusetts
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Boston, Massachusetts, États-Unis, 02215
- Robert Stickgold
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
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)
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Science basique
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
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Aucune intervention: Daytime Wake
Subjects are trained and retested during a single period of daytime wake
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Aucune intervention: Overnight sleep
Subjects are trained on one day and tested the next day, after a night of normal sleep
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Expérimental: Sleep deprivation
Subjects are trained on one day and tested the next day, after a night of sleep deprivation
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Subjects are kept awake all night.
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Expérimental: Daytime Nap
Subjects are trained and then retested after a daytime nap
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Participants are given a 90-minute nap opportunity in the early afternoon.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Motor sequence task improvement
Délai: 4-24 hrs
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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.
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4-24 hrs
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Psychomotor vigilance task lapse rate
Délai: 4-24 hrs
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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.
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4-24 hrs
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Serial reaction time test improvement
Délai: 4-24 hrs
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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.
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4-24 hrs
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Visual discrimination task improvement
Délai: 4-24 hrs
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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.
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4-24 hrs
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Sleep architecture (absolute times)
Délai: 4-24 hrs
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Sleep is recorded with standard polysomnography and the amount of time spent in each wake and sleep stage calculated.
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4-24 hrs
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Sleep architecture (percent times)
Délai: 4-24 hrs
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The percent of total sleep time spent in each sleep stage is calculated.
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4-24 hrs
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Spindle
Délai: 4-24 hrs
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The density of sleep spindles per minute of N2 sleep is calculated.
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4-24 hrs
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Sleep microstructure
Délai: 4-24 hrs
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The EEG spectral power is calculated for N2 and N3 sleep.
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4-24 hrs
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Robert Stickgold, PhD, Beth Israel Deaconess Medical Center
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 2016P000222
- 5R01MH048832-23 (Subvention/contrat des NIH des États-Unis)
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Étudie un produit d'appareil réglementé par la FDA américaine
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