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Neuromodulation of Motivation and Reward Oscillations (NEMO)

3 novembre 2026 aggiornato da: Rick James Macatee, Florida State University

Delta and Theta-Frequency Transcranial Alternating Stimulation Neuromodulation of Motivation and Reward Oscillations in Disorder of Reward Dysfunction.

Cannabis use disorder (CUD) and major depressive disorder (MDD) are among the most prevalent psychiatric conditions in the United States, affecting an estimated 20.6 million and 21 million adults respectively. Both disorders are characterized by anhedonia, diminished motivation, and blunted neural reward sensitivity. This shared dysregulated reward-processing may reflect a common prefrontal oscillatory dysfunction, centralized in mesolimbic dopaminergic reward pathways. This proposed project aims to investigate if transcranial alternating current (tACS) can modulate motivational behaviours and neural reward responsivity in participants with MDD and/or CUD during an effortful reward task. The investigators hypothesize that delta transcranial alternating current stimulation will produce a greater neural reward responsivity (RewP), and motivational behaviour during an effortful reward task.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Disrupted reward processing is a transdiagnostic feature that plays a central role in the development, and maintenance of anhedonia in Cannabis Use Disorder (CUD) and Major Depressive Disorder (MDD). Reward positivity (RewP) is an event-related potential (ERP) component derived from electroencephalogram (EEG) data, associated with motivation, reward responsivity and valuation. This neural signature originates in the medial and dorsolateral prefrontal cortexes. In MDD, reduced RewP has been associated with decreased willingness to expend effort for reward. Research of CUD and RewP is scarce, but dampened RewP has been demonstrated across different substances use disorders (SUDs) in response to monetary reward tasks. Taken together, these findings signal an emerging research frontier to establish RewP as a clinical biomarker and create a compelling mandate for causal investigation. Low-frequency neural oscillations are the key mechanisms facilitating long-distance prefrontal connectivity and interregional communication. Delta oscillations (2.5Hz) in medial and left lateral prefrontal cortexes are closely linked to RewP and reward prediction error signaling, while theta oscillations (6Hz) index cognitive control and prefrontal regulatory engagement during reward processing. Disruptions in both bands have been well documented in MDD, to a more limited extent, in cannabis-using populations. The proposed experiment will causally test whether sham, delta, and theta frequency tACS can alter motivation and reward responsivity (behaviourally [Effort behaviour] and neurally [RewP, delta power]), in participants with disorder of reward dysfunction, CUD, MDD, and healthy controls. Findings from the proposed study will aid in mechanistic understanding of prefrontal circuits underlying reward impairment in CUD and MDD, and ultimately enable for the development of novel brain stimulation techniques to target disorder-maintaining anhedonia. The investigators hypothesise that delta tACS will modulate reward responsivity in participants with disorders of reward. Such that, during the EEfRT Task delta stimulation will enhance reward responsive goal directed behaviour (Behavioral H1) and delta phase connectivity between left lateral and medial frontal electrodes (Neural H1) at effort decision period. As well as greater reward positivity (RewP; Neural 2), and win vs. loss delta power and phase coherence at feedback (Neural H3).

Tipo di studio

Interventistico

Iscrizione (Stimato)

54

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

  • Nome: Zoe Howell Doctoral Student PI, M.Res.
  • Numero di telefono: 850-644-2445
  • Email: brains@psy.fsu.edu

Luoghi di studio

    • Florida
      • Tallahassee, Florida, Stati Uniti, 32306-4301
        • Non ancora reclutamento
        • The BRAINS Lab at Florida State University
        • Contatto:
          • Zoe A Doctoral Student PI, M.Res.
          • Numero di telefono: 850-644-2445
          • Email: brains@psy.fsu.edu
      • Tallahassee, Florida, Stati Uniti, 32306-4301
        • Reclutamento
        • The Riddle Lab at Florida State University
        • Contatto:

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 55 anni (Adulto)

Accetta volontari sani

Sì

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria (General):

  • Aged between 18 - 55 years old.
  • Able to provide informed consent
  • Have normal to corrected vision
  • Willing to comply with all study procedures and be available for the duration of the study
  • Speak and understand English.
  • Negative THC saliva test and alcohol breathalyzer at all lab visits.
  • Negative UTOX for any substance other than THC.

Exclusion Criteria (General):

  • Mania history (Bipolar I, or current mania).
  • Psychosis history.
  • Current suicide intent (score >4 on C-SRSS, or intent >0 on SRA)
  • Current moderate-to-severe SUD or AUD (Except CUD and nicotine for NEMO-CUD).
  • Current pregnancy.
  • Seizure, neurological conditions, or brain surgery history.
  • Implanted medical devices (e.g., cochlear implants, cardiac pacemakers).
  • Change in psychotropic medication in the past 3 months (i.e., medication needs to be stable for 12 weeks).
  • Use of seizure threshold lowering medication (e.g., Stimulants, Benzos, SNRIs, Antipsychotics [Adderall, Vyvanse, Xanax, Wellbutrin, Cymbalta, Lithium] - SSRIs not exclusionary).

Specific CUD Inclusion:

  • Avg. 6+ cannabis use days per week over the past 3-months, and 24+ cannabis use days in the past 30 days.
  • Primary delta-9 or THC-A cannabis flower or vape concentrate user.
  • Current moderate-to-severe CUD (4+ criteria in the past year, at least one criterion other than craving must be met in the past three months).
  • Cannabis is the primary substance of use (Nicotine dependence is allowable)
  • Not currently receiving treatment for cannabis, planning to immediately quit or reduce use.
  • Lifetime history of MDE/PDD must have lifetime anhedonia symptom and/or heavy cannabis user (3+ sessions daily for at least past year including the past 3-months and past 30 days).

Specific MDD Inclusion:

  • Current MDE diagnosis.
  • No lifetime history of severe SUD.
  • No current moderate-to-severe SUD.
  • 100% of NEMO-MDD participants elevated anhedonia on TEPS-C (i.e., 32 or lower on TEPS-C subscale).

Specific Control Inclusion:

  • No current or historical psychiatric diagnosis.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Scienza basilare
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione incrociata
  • Mascheramento: Doppio

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Delta tACS

All participants receive delta (2.5 Hz), theta (6 Hz), and sham tACS across three separate sessions, separated by a 7-10 day washout. Session order is randomised and counterbalanced using a balanced Latin square, within each diagnostic group (CUD, MDD, healthy control). Stimulation is interleaved between the 8 blocks of the EEfRT (e.g., block 1 with stimulation, block 2 without, etc.). EEG activity will be recorded throughout the non-stimulation 4 blocks and proceeding interleaved non-stimulation blocks.

Approximately 20-minutes of delta stimulation (2.5Hz) applied to F3 (returns AF7, FC5, FC1) and AFz (returns Fp1, Fp2, F2). Transcranial Alternating Current Stimulation Device is NeuroConn DC-Stimulator MC.

Comparatore attivo: Theta tACS

All participants receive delta (2.5 Hz), theta (6 Hz), and sham tACS across three separate sessions, separated by a 7-10 day washout. Session order is randomised and counterbalanced using a balanced Latin square, within each diagnostic group (CUD, MDD, healthy control). Stimulation is interleaved between the 8 blocks of the EEfRT (e.g., block 1 with stimulation, block 2 without, etc.). EEG activity will be recorded throughout the non-stimulation 4 blocks and proceeding interleaved non-stimulation blocks.

Approximately 20-minutes of theta stimulation (6Hz) applied to F3 (returns AF7, FC5, FC1) and AFz (returns Fp1, Fp2, F2). Transcranial Alternating Current Stimulation Device is NeuroConn DC-Stimulator MC.

Comparatore fittizio: Sham tACS

All participants receive delta (2.5 Hz), theta (6 Hz), and sham tACS across three separate sessions, separated by a 7-10 day washout. Session order is randomised and counterbalanced using a balanced Latin square, within each diagnostic group (CUD, MDD, healthy control). Stimulation is interleaved between the 8 blocks of the EEfRT (e.g., block 1 with stimulation, block 2 without, etc.). EEG activity will be recorded throughout the non-stimulation 4 blocks and proceeding interleaved non-stimulation blocks.

The tACS stimulation is briefly turned on and off over the course of 15-30 seconds.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Effort-updating behavior during decision period.
Lasso di tempo: Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

The % of hard effort choices selected following a win versus following a loss.

Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.
Delta phase coherence between left lateral and medial frontal electrodes during decision period following a win versus following a loss.
Lasso di tempo: Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Electrical activity of the brain will be recorded via EEG during performance of the task and neurostimulation. Delta phase connectivity between left lateral and medial frontal electrodes during the decision period following a win versus following a loss.

Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.
Reward positivity amplitude
Lasso di tempo: Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Electrical activity of the brain will be recorded via EEG during performance of the task and neurostimulation. Reward positivity amplitude to wins vs. losses.

Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Delta event-related spectral power
Lasso di tempo: Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Electrical activity of the brain will be recorded via EEG during performance of the task and neurostimulation. Delta power to wins vs. losses.

Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.
Delta intertrial phase coherence
Lasso di tempo: Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Electrical activity of the brain will be recorded via EEG during performance of the task and neurostimulation. Delta intertrial phase coherence to wins vs. losses.

Baseline (Day 0), Sham Session (Day 1-10, or Day 10-20, or Day 20-30), Theta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30), Delta Stim. Session (Day 1-10, or Day 10-20, or Day 20-30). Specific range depends on particular counterbalanced order.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Investigatori

  • Investigatore principale: Richard J Macatee, Ph.D., Florida State University

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

1 novembre 2026

Completamento primario (Stimato)

1 aprile 2027

Completamento dello studio (Stimato)

1 maggio 2027

Date di iscrizione allo studio

Primo inviato

26 ottobre 2026

Primo inviato che soddisfa i criteri di controllo qualità

3 novembre 2026

Primo Inserito (Effettivo)

9 novembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

9 novembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

3 novembre 2026

Ultimo verificato

1 ottobre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • STUDY00007710

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Descrizione del piano IPD

The IPD will only be shared under reasonable request. The investigators might not share IPD in order to keep participant confidentiality paramount.

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

Sì

prodotto fabbricato ed esportato dagli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .