- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07592169
Confirmatory Trial of Gamma Neurofeedback to Improve Working Memory in Schizophrenia
Confirmatory Efficacy Trial to Confirm the Effects of Gamma EEG-Neurofeedback on Working Memory in Schizophrenia
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Schizophrenia is associated with deficits in gamma frequency (30-45 Hz) neural synchrony and working memory that are resistant to antipsychotic treatment. EEG neurofeedback (EEG-NFB) targeting frontal gamma coherence is a non-invasive approach that may restore gamma synchrony and improve working memory by reinforcing endogenous neural oscillations in real time.
This confirmatory RCT builds on a successful pilot trial (R33) demonstrating feasibility and preliminary efficacy of gamma EEG-NFB in schizophrenia. Participants (N=104) are randomized 1:1 to active gamma EEG-NFB or sham EEG-NFB. Active EEG-NFB delivers real-time feedback of frontal gamma coherence (F3/F4, 30-50 Hz) via a CGX wireless headset. Sham participants undergo identical procedures but receive pre-recorded feedback unrelated to their own brain activity. Both groups complete 30 sessions over 12 weeks (two sessions per week).
Co-primary outcomes are working memory (N-back d-prime) and frontal gamma coherence, assessed at baseline and Week 12. Secondary outcomes include global cognition, symptoms (PANSS), negative symptoms (CAINS), and community functioning (ILSS, UPSA-Brief, SFS). Follow-up assessments are conducted at 3 months (Week 24) and 6 months (Week 36) post-treatment. Primary analysis uses mixed model repeated measures (MMRM).
Type d'étude
Inscription (Estimé)
Phase
- Phase 2
Contacts et emplacements
Coordonnées de l'étude
- Nom: Autumn Harris Study Coordinator
- Numéro de téléphone: 858-267-2257
- E-mail: fnlab@health.ucsd.edu
Sauvegarde des contacts de l'étude
- Nom: Jason Holden Lab Manager, PhD
- Numéro de téléphone: 858-267-2257
- E-mail: fnlab@health.ucsd.edu
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
Accepte les volontaires sains
La description
Inclusion Criteria:
- 1. DSM-5 diagnosis of schizophrenia or schizoaffective disorder, confirmed by the Structured Clinical Interview for DSM-5 (SCID-5) 2. Age 18-55 years 3. Clinically stable: no psychiatric hospitalization in the 3 months prior to enrollment 4. No change in antipsychotic medication type or dosage within 4 weeks prior to baseline assessment 5. Ascertained to be clinically and medically stable by a study investigator 6. Does not meet DSM-5 diagnostic criteria for bipolar disorder or current major depressive episode 7. No electroconvulsive therapy (ECT) within 6 months of baseline assessment 8. Able to read and speak English (corrected vision or hearing aids acceptable) 9. Able and willing to provide written informed consent
Exclusion Criteria:
- 1. Self-reported history of seizure disorder 2. Diagnosed with multiple sclerosis 3. History of stroke or major vascular disease, including insulin-dependent diabetes mellitus 4. HIV/AIDS diagnosis 5. Current (not past) major depressive episode 6. Substance use disorder other than nicotine use disorder or caffeine use disorder in the past year 7. Brain cancer (primary or metastatic) 8. Prior head injury involving loss of consciousness 9. Inability to read or speak English 10. Color blindness that interferes with administration of study assessments 11. Neuropsychological or cognitive testing in the past 6 months using the same measures as this study 12. Score on Letter-Number Sequencing greater than 1 standard deviation above the age-normed mean
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Tripler
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: Gamma EEG-NFB
Participants receive real-time gamma EEG neurofeedback targeting frontal gamma coherence (F3 and F4 electrodes, 30-50 Hz) via a CGX wireless 32-electrode headset.
Each session includes a 1-minute resting baseline followed by two 15-minute training blocks.
Positive reinforcement (images and music) is contingent on meeting an individualized gamma coherence threshold.
Sessions are twice weekly for 12 weeks (30 total sessions).
|
Gamma EEG neurofeedback delivered via CGX/Cognionics wireless headset (FDA cleared for research use).
Active arm receives real-time gamma coherence feedback; sham arm receives pre-recorded feedback unrelated to own brain activity.
Autres noms:
|
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Comparateur factice: Sham EEG-NFB
Participants undergo identical procedures to the active arm including EEG electrode placement and the same session structure, twice weekly for 12 weeks.
However, the feedback displayed is pre-recorded from prior participants and has no relationship to the participant's own brain activity.
Participants and outcome assessors are blinded to group assignment.
|
Gamma EEG neurofeedback delivered via CGX/Cognionics wireless headset (FDA cleared for research use).
Active arm receives real-time gamma coherence feedback; sham arm receives pre-recorded feedback unrelated to own brain activity.
Autres noms:
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
N-back 2-back target accuracy (d-prime)
Délai: Baseline to Week 12
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Working memory performance on the N-back task (2-back condition), analyzed with mixed model repeated measures (MMRM).
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Baseline to Week 12
|
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Frontal gamma coherence during N-back task
Délai: Baseline to Week 12
|
EEG-derived frontal gamma coherence (30-50 Hz, F3-F4) measured during 2-back task performance.
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Baseline to Week 12
|
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Independent Living Skills Survey (ILSS) total score
Délai: Baseline to Week 12
|
Functional outcome assessing independent living skills relevant to community functioning.
|
Baseline to Week 12
|
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Fiza Singh, MD, University of California, San Diego
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
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
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- R01MH139831
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Description du régime IPD
Délai de partage IPD
Critères d'accès au partage IPD
Type d'informations de prise en charge du partage d'IPD
- PROTOCOLE D'ÉTUDE
- SÈVE
- CIF
Informations sur les médicaments et les dispositifs, documents d'étude
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