Vagal Nerve Stimulation To Enhance Cognition and Learning
Evaluation of Vagus Nerve Stimulation Paired With Cognitive Training to Enhance Learning and Memory and Neural Plasticity in Post-Stroke Patients
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Descrizione dettagliata
Stroke survivors frequently experience persistent cognitive, memory, and language-related difficulties that can affect independence and quality of life. VNS paired with rehabilitation has been shown to enhance motor recovery after stroke, and paired stimulation may support experience-dependent neural plasticity. This study extends that approach to cognitive and language learning by pairing VNS with structured foreign-language vocabulary training.
Eligible participants will be adults with prior stroke who are scheduled to receive, or have received, clinically indicated Vivistim VNS implantation for rehabilitation and who are able to participate in the language-learning intervention. Participants will be randomized to active VNS or sham stimulation during daily language-learning sessions over approximately six weeks. The active stimulation group will receive programmed VNS paired with language-learning stimuli; the sham group will undergo the same language-learning procedures with stimulation amplitude set to zero or otherwise configured according to the sham protocol. Participants will be blinded to group assignment when feasible.
The neuroimaging sub-study will include MRI/fMRI at up to three time points: pre-surgery baseline, when feasible before clinically indicated implantation; post-surgery/pre-language-training baseline; and post-training. The post-surgery/pre-training scan is the key baseline for the language-learning intervention, particularly for participants who already have the device implanted. MRI sessions will include structural MRI, resting-state fMRI, and a task-based foreign-word semantic matching paradigm. The primary task-based fMRI contrast will examine changes in neural responses to future-trained versus trained foreign words compared with never-trained foreign words. Resting-state analyses will examine changes in functional connectivity across language, memory, salience/arousal, frontoparietal cognitive control, and stroke recovery networks. A brief optional 0-back/1-back working-memory fMRI task may be included if scan time and participant tolerance allow.
Tipo di studio
Tipo di studio
Iscrizione (Stimato)
Iscrizione
Fase
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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New York
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Stony Brook, New York, Stati Uniti, 11790
- Stony Brook University Hospital
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
- Adulto
- Adulto più anziano
Accetta volontari sani
Descrizione
Inclusion Criteria:
- Adults aged 22 years or older
- History of stroke
- Implanted with a Vivistim™ VNS device
- Monolingual in English
- Home-dwelling and independent in activities of daily living
- No prior language training in the selected language of learning
- Tolerated 6 weeks of movement therapy at 0.8 mA without incident and has used the device for at-home stimulation without incident
- Willing and able to participate in a six-week at-home intervention
- Clinically stable, without major concurrent medical conditions that would interfere with study participation
Exclusion Criteria:
- Severe aphasia
- Unable to read and/or write in English
- Significant uncorrected hearing or visual impairment
- Unable to commit to 6 weeks of therapy
- Pregnancy
- Prisoner or ward of the state
- Any medical condition that, in the investigator's judgment, would make participation unsafe
- Younger than 22 years of age
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Separare
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
|---|---|
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Comparatore attivo: VNS Group
Group that was implanted with VNS and will receive stimulations
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Subjects previously implanted with VNS will undergo second language acquisition
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Comparatore fittizio: Sham Group
Group that will receive sham stimulations
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Subjects previously implanted with VNS will undergo second language acquisition
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Change in Foreign-Language Vocabulary Learning Accuracy
Lasso di tempo: Baseline and 6 weeks
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Vocabulary learning will be assessed using trained foreign-language vocabulary items.
The outcome is the percentage of trained vocabulary items correctly recalled, recognized, or translated.
Scores range from 0% to 100%, with higher scores indicating better vocabulary learning.
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Baseline and 6 weeks
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Change in Foreign-Language Sentence Learning Accuracy
Lasso di tempo: Baseline and 6 weeks
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Sentence learning will be assessed using trained short foreign-language sentences.
The outcome is the percentage of trained sentence items correctly understood, completed, recalled, or translated.
Scores range from 0% to 100%, with higher scores indicating better sentence learning.
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Baseline and 6 weeks
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Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Change in Global Cognition on the Montreal Cognitive Assessment (MoCA)
Lasso di tempo: 6 weeks
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Global cognition will be measured using the Montreal Cognitive Assessment total score.
Scores range from 0 to 30, with higher scores indicating better cognitive function.
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6 weeks
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Change in Verbal Learning on the Rey Auditory Verbal Learning Test
Lasso di tempo: 6 weeks
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Verbal learning will be measured as the total number of words recalled across Rey Auditory Verbal Learning Test learning trials.
Scores range from 0 to 75, with higher scores indicating better verbal learning.
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6 weeks
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Change in Delayed Verbal Memory on the Rey Auditory Verbal Learning Test
Lasso di tempo: 6 weeks
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Delayed verbal memory will be measured as the number of words recalled after a delay on the Rey Auditory Verbal Learning Test.
Scores range from 0 to 15, with higher scores indicating better delayed verbal memory.
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6 weeks
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Change in Verbal Learning on the Hopkins Verbal Learning Test-Revised
Lasso di tempo: 6 weeks
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Verbal learning will be measured as the total number of words recalled across Hopkins Verbal Learning Test-Revised immediate recall trials.
Scores range from 0 to 36, with higher scores indicating better verbal learning.
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6 weeks
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Change in Delayed Verbal Memory on the Hopkins Verbal Learning Test-Revised
Lasso di tempo: 6 weeks
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Delayed verbal memory will be measured as the number of words recalled after a delay on the Hopkins Verbal Learning Test-Revised.
Scores range from 0 to 12, with higher scores indicating better delayed verbal memory.
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6 weeks
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Change in Language Function on the Western Aphasia Battery
Lasso di tempo: 6 weeks
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Language function will be measured using the Western Aphasia Battery Aphasia Quotient.
Scores range from 0 to 100, with higher scores indicating better language function.
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6 weeks
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Change in Story Recall on the Automatic Story Recall Test
Lasso di tempo: 6 weeks
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Story recall will be measured using the Automatic Story Recall Test score.
Scores will be reported as the percentage of story content correctly recalled, ranging from 0% to 100%, with higher scores indicating better story recall.
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6 weeks
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Change in Working Memory on the Digit Span Task
Lasso di tempo: 6 weeks
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Working memory will be measured using the Digit Span Task total raw score.
Scores range from 0 to 48 if using the WAIS-IV Digit Span version, with higher scores indicating better working memory.
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6 weeks
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Altre misure di risultato
Altre misure di risultato
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Change in Resting-State Functional Connectivity Between Language and Memory Networks
Lasso di tempo: Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
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Resting-state functional connectivity between predefined language and memory networks will be measured.
The outcome will be reported as change in Fisher z-transformed correlation coefficients between these networks.
Higher values indicate stronger functional connectivity.
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Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
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Change in Resting-State Functional Connectivity Between Language and Salience/Arousal Networks
Lasso di tempo: Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
|
Resting-state functional connectivity between predefined language and salience/arousal networks will be measured.
The outcome will be reported as change in Fisher z-transformed correlation coefficients between these networks.
Higher values indicate stronger functional connectivity.
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Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
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Change in Resting-State Functional Connectivity Between Language and Default Mode Networks
Lasso di tempo: Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
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Resting-state functional connectivity between predefined language and default mode networks will be measured.
The outcome will be reported as change in Fisher z-transformed correlation coefficients between these networks.
Higher values indicate stronger functional connectivity.
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Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
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Change in Resting-State Functional Connectivity Between Language and Frontoparietal Cognitive-Control Networks
Lasso di tempo: Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
|
Resting-state functional connectivity between predefined language and frontoparietal cognitive-control networks will be measured.
The outcome will be reported as change in Fisher z-transformed correlation coefficients between these networks.
Higher values indicate stronger functional connectivity.
|
Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention
|
|
Change in Task-Based fMRI Activation During Foreign-Word Processing
Lasso di tempo: Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention.
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Task-based fMRI activation will be measured during presentation of trained, future-trained, and never-trained foreign words.
The outcome will be reported as change in blood-oxygen-level-dependent activation, measured by contrast estimate or percent signal change, for trained and future-trained words compared with never-trained words.
Higher values indicate greater task-related activation.
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Pre-surgery baseline, post-surgery/pre-training baseline, and immediately after the 6-week language-training intervention.
|
Collaboratori e investigatori
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Completamento dello studio (Stimato)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
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Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- IRB2025-00209
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- ICF
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