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Sviluppo del cervello, impulsività e compulsività

24 settembre 2026 aggiornato da: National Institute of Mental Health (NIMH)

Uno studio osservazionale del cervello in via di sviluppo, impulsività e compulsività.

Background:

Impulsivity is acting 'without thinking.' Compulsivity is being overly inflexible. People vary in how impulsive or compulsive they are. Extreme versions of these behaviors play a role in mental disorders. Researchers want to study changes in the brain to learn more about these behaviors. Differences in genes may also play a role.

Objective:

To learn about genetic & brain features that explain why levels of impulsivity and compulsivity vary across people.

Eligibility:

People ages 6 - 80

Design:

Participants will be screened with a medical history and medical record review.

Participants will talk about their mental and behavioral development. They may discuss topics like drug use and sexual activity. They will complete surveys about their compulsivity and impulsivity. Parents of child participants may also complete these surveys.

Participants may take memory, attention, and thinking tests. They may give blood or saliva samples for gene studies and they may give blood to make induced pluripotent stem cells. Participants may have their face and irises photographs taken.

Participants may have a magnetic resonance imaging scan. It will take pictures of their brain. The scanner is shaped like a cylinder. Participants will lie on a table that slides in and out of the scanner. A coil will be placed over their head. They will lie still, watch a movie, and play a game.

Participants may ask family members to join the study. Researchers are particularly interested in recruiting twin pairs to the study.

Participants under age 25 may repeat these tests every 1-2 years until they turn 25 or until the study ends. For those over age 25, participation will last less than 1 month.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Descrizione dettagliata

Study Description:

Many neuropsychiatric disorders have extreme impairing impulsivity and compulsivity behaviors at their core. We hypothesized that the development of symptoms of impulsivity and compulsivity during childhood/adolescence and early adulthood will be associated with atypical trajectories of brain features including cortical glutamate (the main excitatory neurotransmitter) and functional/structural brain connectivity. Additionally, we hypothesize that cortical glutamate will be under genetic control (i.e., heritable) and that common genetic variant risk for disorders characterized by extreme impulsivity (e.g., attention deficit hyperactivity disorder) and by extreme compulsivity (e.g., obsessive compulsive disorder, autism spectrum disorder) will also be associated with atypical cortical glutamate trajectories. To elucidate the relationships between the developing brain, compulsivity/impulsivity and genomics, we will collect clinical assessments including clinician-led interviews, neurobehavioral assessments, neuroimaging data, and genomic samples using 1) a prospective longitudinal design to answer developmental hypotheses; 2) a twin design to assess heritability hypotheses.

Objectives:

Primary Objective:

A) To assess the effects of impulsivity and compulsivity on the developmental trajectories of cortical glutamate.

B) To determine the heritability of cortical glutamate.

Secondary Objectives:

A) To establish the reliability of glutamate measurements.

B) To examine the impact of atypical glutamate levels on developing structural and functional connections within the fronto-striatal circuits.

C) To assess within twin pair differences in neurodevelopmental markers (cortical glutamate, structural/functional MRI) in relation to differences in symptom domains.

Endpoints:

Primary Endpoint:

A) Age-related change in cortical glutamate levels and its moderation by individual differences in levels of impulsivity and compulsivity.

B) Heritability of cortical glutamate (proportion of variance explained by additive genetic factors).

Secondary Endpoints:

A) 1) Glutamate levels estimated at 3 Tesla at short intervals to establish test-retest reliability.

2) Glutamate levels estimated at both 3 Tesla and 7 Tesla (cross scanner validation).

B) Measures of the brain's structural and functional connectivity.

C) Within twin-pair differences in neurodevelopmental markers symptom domains (impulsivity/compulsivity).

Tipo di studio

Osservativo

Iscrizione (Stimato)

1100

Contatti e Sedi

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

Contatto studio

Luoghi di studio

  • Stati Uniti
    • Maryland
      • Bethesda, Maryland, Stati Uniti, 20892
        • Reclutamento
        • National Institutes of Health Clinical Center
        • Contatto:
          • For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)
          • Numero di telefono: TTY8664111010 800-411-1222
          • Email: prpl@cc.nih.gov

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 6 anni a 80 anni (Bambino, Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

Individuals between 6 and 80 years of age with a wide range of impulsivity/compulsivity behaviors - ranging from normal to mildly/extremely impaired - will be recruited. No specific demographic groups will be targeted. Recruitment will be mainly done in the District of Columbia/Maryland/Virginia area, however some participants might travel from elsewhere.

Descrizione

  • INCLUSION CRITERIA:

In order to be eligible to participate in this study, an individual must meet all of the following criteria:

  1. Stated willingness to comply with all study procedures and availability for the duration of the study.
  2. Must be between 6 and 80 years of age.
  3. Ability of participant to understand and the willingness to sign a written informed consent document.

EXCLUSION CRITERIA:

An individual who meets any of the following criteria will be excluded from participation in this study:

  1. Cognitively not capable of performing study procedures or lack of capacity to provide informed consent. Indications of a lack of cognitive capacity could include a known full-scale IQ under 70, or a history from the screening interview that implies global intellectual disabilities (e.g., placement in a school for children with intellectual disability etc.)
  2. Very premature birth (i.e., birth before 32 weeks of gestational age).
  3. Any known brain abnormalities (e.g., tumor, periventricular leukomalacia, microcephaly) or history of medical conditions known to affect cerebral anatomy (e.g., epilepsy, history of stroke, head injury with a loss of consciousness of one hour or more).
  4. Psychotic disorders (including schizophrenia, psychosis not otherwise specified).
  5. Dementia, or other conditions that, in the opinion of the investigators, would impede compliance or possibly hinder completion of the study.
  6. Pregnant women.
  7. Any other medical or psychiatric condition that in the opinion of the PI may confound study data/assessments.

Additional exclusion criteria for optional MRI procedure:

1. Individuals who are not able to receive an MRI (e.g., metal bioimplants, claustrophobia, inability to lie flat on their backs, pregnant women, and any other contraindications for MRI scanning according to the NMR Center MRI safety guidelines).

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

  • Modelli osservazionali: COHORT
  • Prospettive temporali: PROSPECTIVE

Coorti e interventi

Gruppo / Coorte
impulsive compulsive

Individuals between 6 and 80 years of age with a wide range of impulsivity/compulsivity behaviors - ranging from normal to mildly/extremely impaired.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Glutamate concentration measured using Magnetic Resonance Spectroscopy
Lasso di tempo: Yearly if possible

Age-related change in cortical glutamate levels and its moderation by individual differences in levels of impulsivity and compulsivity.
Yearly if possible
Heritability of cortical glutamate (proportion of variance explained by additive genetic factors).
Lasso di tempo: Baseline

Degree to which glutamate levels are under genetic control.
Baseline

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Structural and functional connectivity
Lasso di tempo: Yearly if possible

Structural and functional connectivity measured throughout development using Magnetic Resonance Imaging.
Yearly if possible
Glutamate levels
Lasso di tempo: weeks to months

Glutamate measurement at 7 Tesla is now the gold standard for glutamate measurements, against which we will compare measurements at 3 Tesla.
weeks to months
Differences in glutamate levels and other neurodevelopmental markers within twin pairs.
Lasso di tempo: Yearly if possible

Differences in twin characteristics will be measured through clinical symptom assessment, biomarkers, Magnetic Resonance Imaging, neuropsychological testing, and questionnaires.
Yearly if possible

Collaboratori e investigatori

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

Sponsor

National Institute of Mental Health (NIMH)

Investigatori

  • Investigatore principale: Tonya J White, M.D., National Institute of Mental Health (NIMH)

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.

Pubblicazioni generali

Collegamenti utili

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 (Effettivo)

30 settembre 2022

Completamento primario (Stimato)

31 dicembre 2030

Completamento dello studio (Stimato)

31 dicembre 2031

Date di iscrizione allo studio

Primo inviato

14 novembre 2020

Primo inviato che soddisfa i criteri di controllo qualità

14 novembre 2020

Primo Inserito (Effettivo)

17 novembre 2020

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

25 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

24 settembre 2026

Ultimo verificato

23 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • 200147
  • 20-HG-0147

Piano per i dati dei singoli partecipanti (IPD)

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

SÌ

Descrizione del piano IPD

All de-identified medical information will be placed in a NIH repository (e.g., Biomedical Translational Research Information System (BTRIS)) in accordance to NIH policies. We will also share genomic and phenotypic data in controlled access databases such as dbGAP (database of Genotypes and Phenotypes). Other databases may be used as approved by NIH for the sharing of de-identified data.

Periodo di condivisione IPD

The timeline for data sharing will follow the NHGRI Genomic Data Sharing Policy. Currently data is deposited following IRB review once the study data collection is complete and the data has undergone quality control steps.

Criteri di accesso alla condivisione IPD

Access requests for specific research purposes using NIH controlled-access data are reviewed by NIH Data Access Committees (DACs).

Tipo di informazioni di supporto alla condivisione IPD

  • STUDIO_PROTOCOLLO

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

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 .

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