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- Klinische proef NCT02212366
To Enhance Cognition in Late Life Depression Using Transcranial Direct Current Stimulation
Enhancing Cognition in Patients With Late-Life Depression: A Randomized Controlled Trial of Transcranial Direct Current Stimulation
Studie Overzicht
Toestand
Interventie / Behandeling
Gedetailleerde beschrijving
tDCS is a non-invasive brain stimulation method that utilizes low intensity electrical current either to increase cortical excitability with an anodal electrode or to suppress cortical excitability with a cathodal electrode. tDCS produces its effects through long lasting changes in neuroplasticity: in animal studies, tDCS results in long-term potentiation and brain-derived neurotrophic factor secretion; in human studies, tDCS results in potentiation of neurophysiologic markers of neuroplasticity. Consistent with these preclinical findings, tDCS to the temporoparietal cortex or left DLPFC improves memory in patients with mild to moderate Alzheimer disease(AD). tDCS has also been tested among patients with depression - including by our group - but mainly as a treatment for depressive symptoms. In one recent large study one session of bilateral anodal tDCS was shown to enhance working memory among midlife participants with major depression prior to receiving any treatment. However, it is still not known (1) whether tDCS improves cognition beyond the partial improvement that is associated with resolution of depressive symptoms; or (2) whether it has a more fundamental and long lasting effect on cognition.
This trial will assess the acute and long-term effects of a 2-week course of daily (5 days/week) bilateral anodal tDCS of the DLPFC on cognition, and in particular working memory among 36 patients with LLD. We will recruit and randomize participants who have already been treated for LLD prior to consenting to the study and who still meet criteria for remission while on antidepressant medications.
This trial will also be used as a platform to explore the effect of tDCS on neurophysiologic measures of plasticity during working memory performance. Working memory is supported by re-entrant circuits, some are local within the DLPFC and others are long-range connecting the DLPFC to more posterior cortices. These networks result in high and low frequency neuronal oscillations that can be captured by electroencephalography (EEG). Using novel neurophysiologic analyses, our group and others have demonstrated that the modulation of high-frequency (particularly gamma) oscillations by low-frequency (particularly theta) oscillations - "theta-gamma coupling" - is a neurophysiologic marker of working memory. Thus, we will explore the effect of tDCS on theta-gamma coupling.
Studietype
Inschrijving (Werkelijk)
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Ontario
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Toronto, Ontario, Canada, M6J1H4
- Center for Addiction and Mental Health
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
- Women and men of any races or ethnicity
- Age 60 and above
- Major depressive disorder, single or recurrent per SCID DSM-IV criteria AND remission from that episode as defined by DSM IV-TR criteria for remission.
- Montgomery-Asberg Depression Rating Scale (MADRS) score less than 10.
- Ability to speak English fluently enough to complete all research assessments.
- Corrected visual ability to read newspaper headlines; hearing capacity to respond to a raised conversational voice
- Willingness and ability to provide consent
Exclusion Criteria:
- DSM IV TR criteria for any dementia
- DSM IV TR criteria for life-time bipolar disorder, schizophrenia, schizoaffective disorder, or other psychotic disorders
- DSM IV TR criteria for any substance abuse or dependence within the past 6 months
- Presence of psychotic features or any other symptoms that would make the participant unable to participate in the study.
- Any medical contra-indications to tDCS.
- Electroconvulsive therapy in the last 6 months.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Verdrievoudigen
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Experimenteel: Active TDCS
2-week course of daily (5 days/week) active bilateral anodal TDCS, duration 30 minute each session.
Current 2 mA.
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Active Stimulation
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Sham-vergelijker: Sham TDCS
2-week course of daily (5 days/week) Sham bilateral tDCS.
Duration 30 minute each session.
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Sham Stimulation
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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To compare performance on working memory task (N-Back) and neuropsychological battery between active and sham TDCS groups
Tijdsspanne: Two weeks following the TDCS course
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Two weeks following the TDCS course
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Secundaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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To compare performance on working memory task (N-Back) and neuropsychological battery between active and sham TDCS groups
Tijdsspanne: Three months following the TDCS course
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Three months following the TDCS course
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Andere uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
|
To compare theta-gamma coupling as measured by electroencephalography between active and sham TDCS groups.
Tijdsspanne: Two weeks following the TDCS
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Two weeks following the TDCS
|
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To compare theta-gamma coupling as measured by electroencephalography between active and sham TDCS groups.
Tijdsspanne: 3 months following the TDCS
|
3 months following the TDCS
|
Medewerkers en onderzoekers
Medewerkers
Onderzoekers
- Hoofdonderzoeker: Tarek K Rajji, MD, Center for Addiction and Mental Health
Publicaties en nuttige links
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- 131/2013
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .
Klinische onderzoeken op Active TDCS
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Maastricht University Medical CenterB. Braun/Aesculap SpineVoltooidVerplaatsing van de tussenwervelschijf | DiskectomieNederland
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Universidad Complutense de MadridOnbekendAtletische prestatieSpanje
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Aesculap Implant SystemsVoltooidDegeneratieve schijfziekteVerenigde Staten
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Hôpital le VinatierVoltooidSchizofrenie | Auditieve hallucinatiesFrankrijk, Tunesië
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Northeastern UniversityMassachusetts General Hospital; National Institute on Aging (NIA)Onbekend
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Universidad de AlmeriaSecretaría General de Universidades, Investigación y Tecnología, Junta de Andalucía...Aanmelden op uitnodigingMiddelgerelateerde aandoeningenSpanje
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New York UniversityWervingGezondVerenigde Staten
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University of MichiganNational Institute of Mental Health (NIMH)Voltooid
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Bambino Gesù Hospital and Research InstituteVoltooid
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University of North Carolina, Chapel HillNational Institute of Mental Health (NIMH)VoltooidMotorische activiteit | Motorische neuroplasticiteitVerenigde Staten