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Magnetisk resonanstomografi (MRI) av nevropsykiatriske pasienter og friske frivillige

4. november 2026 oppdatert av: National Institute of Mental Health (NIMH)

Strukturell og funksjonell avbildning av nevropsykiatriske pasienter og normale frivillige med 3.0 Tesla MR og Magnetoencefalografi

The purpose of this study is to use brain imaging technology to compare differences in brain structure, chemistry, and functioning in individuals with brain and mental disorders compared to healthy volunteers.

Schizophrenia is a brain disorder that results from subtle changes and abnormalities in neurons. These deficits likely occur in localized regions of the brain and may result in widespread, devastating consequences. The neuronal abnormalities are inherited through a complex combination of genetic and environmental factors. Brain imaging technologies can be used to better characterize brain changes in individuals with schizophrenia. This study will use magnetic resonance imaging (MRI) scans to identify predictable, quantifiable abnormalities in neurophysiology, neurochemistry and neuroanatomy that characterize schizophrenia and other neurological and neuropsychiatric disorders....

Studieoversikt

Status

Fullført

Forhold

Detaljert beskrivelse

This protocol is meant to provide a matrix for multiple, simultaneous brain imaging investigations using magnetic resonance imaging (MRI) at 3.0 Tesla (3T). We intend to study regional brain structure, physiology, and biochemistry in living human subjects, both healthy and ill. Based on multiple clinical, neuropathological, and functional neuroimaging studies, it is clear that schizophrenia is a brain disorder arising from subtle neuronal deficits (for lack of more specific terminology). These deficits likely arise in a few key regions such as dorsolateral prefrontal cortex and hippocampal formation, that result in widespread, multifaceted, and devastating clinical consequences. These neuronal deficits are clearly heritable, although in a complex fashion from multiple genes interacting in an epistatic fashion with each other and the environment. We hypothesize that these neuronal deficits, clearly resulting in quantifiable behavioral abnormalities in schizophrenic patients, will produce predictable, quantifiable aberrations in neurophysiology that we can "map" using magnetic resonance imaging. In spite of numerous functional imaging findings, clinical applications remain scarce and pathognomonic findings absent. Therefore, we do not anticipate that an approach based solely on any one modality is likely to significantly advance our knowledge base. Instead, we propose to create brain imaging datasets for individual human subjects predicated on 1) the appraisal of brain function from multiple domains simultaneously; 2) the characterization of brain function via summation and intercorrelation of these data; and 3) the digestion of these data based on the parsing of complex clinical phenomenology into quantifiable neurophysiological parameters. Thus, in addition to the identification of those parameters that best characterize and identify manifest schizophrenia (i.e., state variables), we hypothesize that some of these fundamental characteristics will be heritable. These fundamental characteristics, so-called endo- or intermediate phenotypes, represent powerful tools to find susceptibility genes and have already generated a number of linkage findings.

Studietype

Observasjonsmessig

Registrering (Faktiske)

3273

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

Forente stater
- Maryland
  - Bethesda, Maryland, Forente stater, 20892
    - National Institutes of Health Clinical Center

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 120 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Kjønn som er kvalifisert for studier

Alle

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

Patients with schizophrenia and healthy subjects from the community.

Beskrivelse

INCLUSION CRITERIA:

CONTROLS:

No psychiatric or severe chronic medical illness at the time of the study, and by history. This includes the absence of substance abuse histories, learning disabilities and all DSM IV disorders. The investigators will evaluate medical histories and medical conditions that are judged not to interfere with the study may be allowed.

No use of psychotropic substances in the last 3 months.

There is no upper age limit. The lower age limit is 18 years.

Controls will all have the capacity to consent.

PATIENTS:

Schizophrenia, any subtype or schizo-affective disorder according to DSM IV .

Bipolar Disorder with Psychotic Features according to DSM IV.

Menstrually-Related Mood Disorder.

Mild to Moderate Parkinson's Disease (Hoehn and Yahr Stage 1-3).

Williams Syndrome (partial or full) with IQ in the normal range.

Patients with Multiple Sclerosis.

EXCLUSION CRITERIA:

CONTROLS AND PATIENTS:

Impaired hearing.

Pregnancy.

Head trauma with loss of consciousness in the last year, or any evidence of functional impairment due to and persisting after head trauma.

Patients or healthy volunteers with a known risk from exposure to high magnetic fields (e.g. patients with pace makers) and those who have metallic implants (e.g. braces) in the head region (likely to create artifact on the MRI scans) will be excluded from participating in the fMRI studies.

History of any (excepting nicotine-related) DSM5-defined moderate to severe substance use disorder (or DSM-IV-defined substance dependence).

Cumulative lifetime history of any (excepting nicotine-related) DSM5-defined mild substance use disorder (or any DSM-IV-defined substance abuse), either in excess of 5 years total or not in remission for at least 6 months.

NIMH employees and staff and their immediate family members will be excluded from the study per NIMH policy.

Non-NIMH NIH employees and staff may participate and will be given the NIH Frequently Asked Questions (FAQs) for NIH Staff Who are Considering Participation in NIH Research.

PATIENTS:

Coexistence of another major mental illness at the time of the study. If the patients experienced other mental illnesses in the past (e.g. a learning disability or major depression), then this should be judged to be fully recovered.

Major concurrent medical illness likely to interfere with the acquisition of the task.

Concomitant medications which could interfere with performance on the task.

Involuntary movements that interfere with positioning in the MRI scanner).

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Observasjonsmodeller: CASE_CONTROL
Tidsperspektiver: CROSS_SECTIONAL

Antall grupper / kohorter

Kohorter og intervensjoner

Gruppe / Kohort
Healthy volunteers Healthy subjects from the community
Schizophrenia Patients with schizophrenia and psychosis
Williams Syndrome Individuals with copy number variation in the Williams Syndrome Region

Hva måler studien?

Primære resultatmål

Resultatmål	Tiltaksbeskrivelse	Tidsramme
regional MRSI measures Tidsramme: spectroscopy	GABA and glutamate measurements in schizophrenia and healthy controls.	spectroscopy
magnetic field potentials Tidsramme: MEG	Group differences in MEG signal for patients with schizophrenia and healthy subjects.	MEG
fMRI BOLD responses Tidsramme: MRI study completion	Group differences between patients with schizophrenia and healthy subjects, also genotyping used to characterize subjects as well.	MRI study completion
DTI anisotropy measures Tidsramme: DTI	Compare fractional anisotropy and other measures of white matter connectivity for schizophrenic patients and controls.	DTI
brain volumetric measures Tidsramme: VBM	VBM and cortical parcellation are used in schizophrenia and healthy controls.	VBM

Sekundære resultatmål

Resultatmål	Tidsramme
nevropsykologiske oppgaveytelsesdata Tidsramme: PT	PT

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

National Institute of Mental Health (NIMH)

Etterforskere

Hovedetterforsker: Karen F Berman, M.D., National Institute of Mental Health (NIMH)

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Hjelpsomme linker

<p>NIH Clinical Center Detailed Web Page</p>

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

17. februar 2000

Datoer for studieregistrering

Først innsendt

15. februar 2000

Først innsendt som oppfylte QC-kriteriene