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Aging, Sleep, Cognitive Process (SOMVIE)

4 mars 2011 uppdaterad av: University Hospital, Bordeaux

Aging,Sleep and Cognitive Process

The aim of the study is to determine the impact of aging, circadian rhythms and sleep deprivation on executive performances. Volunteers will complete a 40-hour extended wakefulness period in constant condition (semi-recumbent posture in bed, constant dim light levels < 10 lux, food and liquid intake at regular intervals) in order to control the circadian system. The volunteers will not be allowed to sleep in the sleep deprivation protocol ("high sleep pressure protocol") and will adopt a short wakefulness/sleep cycle (150/75 minutes) in the multiple nap protocol ("low sleep pressure protocol"). Tests and scales will be repeated every 3H45

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Social evolutions (nocturnal activity, shift work) have consequently reduced average sleep duration average. In addition, aging leads to a physiological reduction of nocturnal sleep duration.

Many studies have shown that extended wakefulness impairs nocturnal performances measured with a simple reaction time test (SRTT) and that this decrement is also age-related. In deed, young subjects (20-30 years) are more affected than old subjects (50-60 years) during an extended wakefulness period.

The results obtained in confinement constant conditions, associated to a high or low sleep pressure, show that this difference observed between young and old subjects should be essentially related to a reduced circadian regulation (ex : reduced melatonin secretion) with age rather than to a reduced sleep pressure (homeostatic regulation) as previously suggested. However, studies on confinement have shown that sleep pressure (identified during the sleep period with the EEG delta band) could be reduced with aging specifically on the anterior brain regions (frontal regions).

It is well-known that executive performances (related to frontal lobes functioning) are affected by extended wakefulness, but respective effects of age, circadian system and sleep pressure in this decrement remain unknown.

The aim of this study is to determine the evolution of the executive functions during a 40-hour extended wakefulness period ("high sleep pressure protocol") or during a multiple nap protocol ("low sleep pressure protocol") according to the subjects' age, in constant experimental conditions of confinement.

It's a repeated measurements study with protocol (sleep deprivation and multiple naps) and time of day as within factors and age group (young versus older subjects) as between factor

Studietyp

Interventionell

Inskrivning (Förväntat)

28

Fas

  • Inte tillämpbar

Kontakter och platser

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

Studieorter

  • Frankrike
      • Bordeaux, Frankrike, 33076
        • Genpphass
      • Toulouse, Frankrike, 31405
        • Medes-Imps
      • Toulouse, Frankrike, 31300
        • UH Purpan

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

20 år till 75 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Manlig

Beskrivning

Inclusion Criteria:

  • excessive daytime sleepiness (Epworth Sleepiness Scale score > 9),
  • sleep complaint such as sleep apnea or insomnia (Basic Nordic Sleep Questionnaire, items score < 4 except questions 3, 4 and 15a for aged volunteers),
  • not intermediate in terms of morningness and eveningness according to the Horne-Ostberg questionnaire for young volunteers
  • absence of psychopathology evidenced during psychologist interview or on the Symptom Check List (SCL-90R score>59)
  • sleep efficiency evidenced by actimetry (>85%) during 7 days
  • absence of apnea/hypopnea syndrome (RDI<15)
  • absence of periodic movement disorder (MPS<15)
  • regular sleep schedule during 3 days before study participation
  • affiliated to the french health care system

Exclusion Criteria:

  • volunteers with sleep disorders or organic disorders affecting sleep,
  • poor sleep hygiene or abnormal usual sleep patterns,
  • night workers or shift-workers,
  • substance abusers (caffeine, drug, or alcohol).

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
Experimentell: Y1
young volunteers (20-30 years), morningness chronotype
Övrig: Sleep deprivation and multiple rest
To determine the evolution of the executive functions during a 40-hour extended wakefulness period or during a 40-hour multiple nap protocol in constant experimental conditions of confinement
Experimentell: Y2
young volunteers (20-30 years), eveningness chronotype
Övrig: Sleep deprivation and multiple rest
To determine the evolution of the executive functions during a 40-hour extended wakefulness period or during a 40-hour multiple nap protocol in constant experimental conditions of confinement
Experimentell: O1
Aged volunteers (65-75 years), morningness chronotype
Övrig: Sleep deprivation and multiple rest
To determine the evolution of the executive functions during a 40-hour extended wakefulness period or during a 40-hour multiple nap protocol in constant experimental conditions of confinement
Experimentell: O 2
aged volunteers (65-75 years), eveningness chronotype
Övrig: Sleep deprivation and multiple rest
To determine the evolution of the executive functions during a 40-hour extended wakefulness period or during a 40-hour multiple nap protocol in constant experimental conditions of confinement

Vad mäter studien?

Primära resultatmått

Resultatmått
Tidsram
Executive functions will be evaluated by a Go/NoGo task and a Stop Signal. Performances will be measured with a visual simple reaction time task
Tidsram: every 3h45
every 3h45

Sekundära resultatmått

Resultatmått
Tidsram
Nocturnal sleep quality before and after 2 constant conditions measured by PSG Sleep pressure quantified by Karolinska test and EEG delta band Subjective sleepiness and fatigue evaluated by Karolinska sleepiness scale and visual analogue scale
Tidsram: every 3h45
every 3h45

Samarbetspartners och utredare

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

Sponsor

University Hospital, Bordeaux

Utredare

  • Huvudutredare: Pierre PHILIP, MD,PHD, University Hospital Bordeaux France

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

1 december 2008

Primärt slutförande (Faktisk)

1 februari 2011

Avslutad studie (Faktisk)

1 februari 2011

Studieregistreringsdatum

Först inskickad

8 december 2008

Först inskickad som uppfyllde QC-kriterierna

8 december 2008

Första postat (Uppskatta)

9 december 2008

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

7 mars 2011

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

4 mars 2011

Senast verifierad

1 mars 2011

Mer information

Termer relaterade till denna studie

Nyckelord

Andra studie-ID-nummer

  • CHUBX 2008/17

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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