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Cerebellar Brain Stimulation Plus Language Therapy for People at Risk of Poor Aphasia Recovery After Stroke (PART-CN)

27 octobre 2026 mis à jour par: Johns Hopkins University

Predicting Aphasia Recovery and Testing Cerebellar Neuromodulation (PART-CN): A Pilot Wait-List Randomized Trial of Cathodal Cerebellar Transcranial Direct Current Stimulation Plus Computerized Language Therapy in Stroke Survivors Predicted to Have Poor Language Recovery

This pilot study tests whether a mild form of brain stimulation to the cerebellum, combined with computer-based language therapy, helps people recover language after a stroke when a poor natural recovery is predicted.

People already taking part in a Johns Hopkins study of stroke and language recovery, whose early data suggest the aphasia is unlikely to resolve without treatment, are invited about 3 months after the stroke. Half begin 15 treatment sessions right away and half begin about 3 months later. Each session pairs 25 minutes of transcranial direct current stimulation (tDCS) over the right cerebellum with 45 to 60 minutes of language exercises, with a speech-language pathologist present.

The main question is whether language ability, measured with the Western Aphasia Battery-Revised Aphasia Quotient, improves more by 6 months after stroke in the group treated first than in the group still waiting. The study also checks how accurately a machine learning model, built from data collected in the first days after stroke, predicted each person's language ability 12 months after stroke.

Aperçu de l'étude

Statut

Pas encore de recrutement

Les conditions

Intervention / Traitement

Description détaillée

About one third of people with aphasia after stroke respond poorly to language therapy, and current clinical tools cannot identify these individuals early, when recovery is steepest. This study pairs a recovery prediction model with a targeted treatment.

Aim 1: A machine learning model trained on acute-phase data from the parent longitudinal study (Johns Hopkins IRB NA_00042097; neuroimaging, cognitive-linguistic testing, demographics) predicts each participant's 12-month Western Aphasia Battery-Revised Aphasia Quotient (WAB-R AQ). Participants predicted to remain below 93.8 (aphasia not expected to resolve) are eligible. Prediction accuracy is evaluated prospectively against observed 12-month scores (mean absolute error, correlation, and sensitivity, specificity, positive predictive value and F1 for the below-93.8 classification).

Aim 2: Eligible participants are randomized 1:1 to early intervention (treatment beginning about 3 months post-stroke) or wait-list control (usual care until about 6 months post-stroke, then the same treatment). Treatment is 15 sessions, up to 5 per week over about 3 to 5 weeks. In each session, cathodal tDCS (2 mA, 25 minutes; cathode over the right cerebellum, 1 cm below the inion and 4 cm lateral; anode over the right deltoid; Soterix Medical 1×1 device) is delivered during the first 25 minutes of 45 to 60 minutes of computer-delivered language therapy targeting picture naming, auditory comprehension, reading and spelling, with a speech-language pathologist present throughout. Sessions may take place at a Johns Hopkins site or at home with a study team member present.

The primary comparison is change in WAB-R AQ from baseline (about 3 months post-stroke) to 6 months post-stroke between the treated early group and the untreated wait-list group. Secondary measures include naming of trained items, discourse (content units and syllables per content unit in picture description), functional communication (Communication Activities of Daily Living, Third Edition), emotional well-being (General Health Questionnaire), quality of life (Stroke and Aphasia Quality of Life Scale), and resting-state functional connectivity measured with functional near-infrared spectroscopy (fNIRS). Participants are followed to 12 months post-stroke.

As a pilot, the study is designed to show feasibility of the predict-then-intervene approach and to estimate effect sizes for a future fully powered, sham-controlled trial.

Type d'étude

Interventionnel

Inscription (Estimé)

8

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

  • Nom: Manuel J Marte, PhD, CCC-SLP
  • Numéro de téléphone: 845-598-6911
  • E-mail: mmarte1@jh.edu

Sauvegarde des contacts de l'étude

Lieux d'étude

  • États-Unis
    • Maryland
      • Baltimore, Maryland, États-Unis, 21287
        • The Johns Hopkins Hospital, Phipps Building
        • Contact:
          • Manuel J Marte, PhD, CCC-SLP
          • Numéro de téléphone: 845-598-6911
          • E-mail: mmarte1@jh.edu

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans et plus (Adulte, Adulte plus âgé)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  • Enrolled in the Johns Hopkins longitudinal stroke and aphasia study (IRB NA_00042097)
  • Consented to future contact for research studies
  • Predicted to have poor language recovery from acute-phase data, defined as a predicted Western Aphasia Battery-Revised Aphasia Quotient below 93.8 at 12 months post-stroke
  • Ischemic left hemisphere stroke
  • Aphasia with naming impairment on the Western Aphasia Battery-Revised
  • Approaching 3 months post-stroke at enrollment
  • Fluent speaker of English by self-report
  • Age 18 or older

Exclusion Criteria:

  • Lesion in the right cerebellum
  • Previous neurological disorder other than stroke affecting the brain, or any neurodegenerative or psychiatric disorder
  • Seizures during the previous 6 months
  • Uncorrected visual or hearing loss by self-report
  • Use of medications that lower the seizure threshold (e.g., methylphenidate)
  • Use of N-methyl-D-aspartate (NMDA) receptor antagonists (e.g., memantine)
  • History of brain surgery or any metal in the head
  • Severely impaired auditory comprehension (below 2 on the Western Aphasia Battery-Revised Auditory Verbal Comprehension sub-score)
  • Severely limited verbal output (below 2 on the Western Aphasia Battery-Revised Spontaneous Speech rating)

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: Early intervention

15 sessions of cathodal right cerebellar transcranial direct current stimulation (tDCS; 2 mA, 25 minutes) during computerized language therapy (45 to 60 minutes per session, with a speech-language pathologist present), up to 5 sessions per week over about 3 to 5 weeks, beginning about 3 months post-stroke.
Dispositif: Cathodal cerebellar transcranial direct current stimulation

Cathode (saline-soaked sponge electrode) over the right cerebellum, 1 cm below the inion and 4 cm lateral; anode over the right deltoid. Constant current of 2 mA for 25 minutes, ramped up over the first 15 seconds, from a battery-powered Soterix Medical 1x1 stimulator with pre-programmed parameters. Delivered during the first 25 minutes of each language therapy session.

Autres noms:
  • tDCS
  • Soterix Medical 1x1 tDCS
Comportemental: Computerized language therapy

Computer-delivered language exercises on a tablet, targeting spoken and written picture naming, auditory comprehension, reading and spelling, 45 to 60 minutes per session, with difficulty adjusted to performance and a speech-language pathologist present. Each participant uses the same delivery platform for all sessions.

Autres noms:
  • Computer-delivered naming treatment
Autre: Wait-list control (delayed intervention)

Usual care, which may include outpatient speech-language therapy, from about 3 to 6 months post-stroke; then the same 15-session protocol of cathodal right cerebellar tDCS plus computerized language therapy, beginning about 6 months post-stroke.
Dispositif: Cathodal cerebellar transcranial direct current stimulation

Cathode (saline-soaked sponge electrode) over the right cerebellum, 1 cm below the inion and 4 cm lateral; anode over the right deltoid. Constant current of 2 mA for 25 minutes, ramped up over the first 15 seconds, from a battery-powered Soterix Medical 1x1 stimulator with pre-programmed parameters. Delivered during the first 25 minutes of each language therapy session.

Autres noms:
  • tDCS
  • Soterix Medical 1x1 tDCS
Comportemental: Computerized language therapy

Computer-delivered language exercises on a tablet, targeting spoken and written picture naming, auditory comprehension, reading and spelling, 45 to 60 minutes per session, with difficulty adjusted to performance and a speech-language pathologist present. Each participant uses the same delivery platform for all sessions.

Autres noms:
  • Computer-delivered naming treatment

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change in Western Aphasia Battery-Revised Aphasia Quotient (WAB-R AQ)
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

The WAB-R AQ is a composite measure of overall language impairment, with scores ranging from 0 to 100; higher scores indicate milder aphasia (better outcome). Change from baseline to 6 months post-stroke is compared between the early intervention group (after treatment) and the wait-list group (before treatment).
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Mean Absolute Error Between Predicted and Observed 12-Month Western Aphasia Battery-Revised Aphasia Quotient
Délai: 12 months post-stroke

Mean absolute difference, in WAB-R AQ points (scale 0 to 100), between the machine learning model's predicted 12-month Western Aphasia Battery-Revised Aphasia Quotient (generated from acute-phase data) and the observed 12-month score. Lower values indicate more accurate prediction.
12 months post-stroke

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Percentage of Treatment Items Produced Correctly
Délai: During treatment, up to one week post final treatment session (about 4 to 6 weeks after treatment starts)

Percentage of items trained during treatment that are produced correctly, scored 0 to 100%; higher values indicate better performance.
During treatment, up to one week post final treatment session (about 4 to 6 weeks after treatment starts)
Change in Number of Content Units in Picture Description
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

Total number of content units (accurate, relevant pieces of information) produced when describing the Modern Cookie Theft picture and the Precarious Painter picture. Higher values indicate more informative discourse.
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Change in Syllables per Content Unit in Picture Description
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

Number of syllables produced per content unit in the same picture descriptions
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Change in Communication Activities of Daily Living, Third Edition (CADL-3) Total Score
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

The Communication Activities of Daily Living, Third Edition measures everyday functional communication in people with aphasia. Total raw score ranges from 0 to 100; higher scores indicate better functional communication.
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Change in General Health Questionnaire (GHQ) Total Score
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

The General Health Questionnaire (Goldberg and Hillier) measures psychological distress and emotional well-being. Items are rated using 0 to 3 Likert scale, giving a total score from 0 to 84; higher scores indicate greater psychological distress (worse outcome).
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Change in Stroke and Aphasia Quality of Life Scale (SAQOL-39) Mean Score
Délai: Baseline (approximately 3 months post-stroke) and 6 months post-stroke

The Stroke and Aphasia Quality of Life Scale-39 measures health-related quality of life after stroke and aphasia. Mean score ranges from 1 to 5; higher scores indicate better quality of life.
Baseline (approximately 3 months post-stroke) and 6 months post-stroke
Change in Resting-State Functional Connectivity Between Cortical Language Regions and the Right Cerebellum
Délai: Baseline (approximately 3 months post-stroke), 6 months, and 9 months post-stroke

Resting-state functional connectivity (correlation coefficient of oxygenated hemoglobin signals) between cortical language regions and the right cerebellum, measured with functional near-infrared spectroscopy (fNIRS). Higher values indicate stronger connectivity.
Baseline (approximately 3 months post-stroke), 6 months, and 9 months post-stroke

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Western Aphasia Battery-Revised Aphasia Quotient (WAB-R AQ) at 9 Months Post-Stroke
Délai: 9 months post-stroke

The WAB-R AQ is a composite measure of overall language impairment (range 0 to 100; higher scores indicate milder aphasia). Compared between groups to explore the effect of treatment timing (treatment starting about 3 versus 6 months post-stroke).
9 months post-stroke
Western Aphasia Battery-Revised Aphasia Quotient (WAB-R AQ) at 12 Months Post-Stroke
Délai: 12 months post-stroke

The WAB-R AQ is a composite measure of overall language impairment (range 0 to 100; higher scores indicate milder aphasia). Used to assess durability of treatment effects in all participants.
12 months post-stroke

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Johns Hopkins University

Collaborateurs

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Les enquêteurs

  • Chercheur principal: Melissa D Stockbridge, PhD, CCC-SLP, Johns Hopkins University

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

1 novembre 2026

Achèvement primaire (Estimé)

1 juin 2028

Achèvement de l'étude (Estimé)

1 juin 2028

Dates d'inscription aux études

Première soumission

27 octobre 2026

Première soumission répondant aux critères de contrôle qualité

27 octobre 2026

Première publication (Réel)

3 novembre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

3 novembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

27 octobre 2026

Dernière vérification

1 octobre 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • IRB00562650
  • 2T32HD007414-31 (Subvention/contrat des NIH des États-Unis)

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be shared outside Johns Hopkins. Data collected in this study are coded protected health information under the approved protocol and consent. Aggregate results will be published.

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Oui

produit fabriqué et exporté des États-Unis.

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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