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Transcranial Magnetic Stimulation in Parkinson's Disease

3 mars 2008 uppdaterad av: National Institute of Neurological Disorders and Stroke (NINDS)

TMS Measures in Parkinson's Disease

This study will use transcranial magnetic stimulation (TMS) to explore how the brain controls movement by sending messages to the spinal cord and muscles and what goes wrong with this process in disease. Activity in the motor cortex-the outer part of the brain-will be examined use TMS in patients with Parkinson's disease and in healthy volunteers.

Normal volunteers and patients with Parkinson's disease (stage I to III) 21 years of age and older may be eligible for this study.

All participants will have transcranial magnetic stimulation. For this procedure, an insulated wire coil is placed on the subject's scalp and a brief electrical current is passed through the coil. This creates a magnetic pulse that passes into the brain and generates very small electrical currents in the cortex, briefly disrupting the function of the brain cells in the stimulated area. This may cause muscle twitching or tingling in the face, jaw or limb. During the stimulation, participants will be asked to tense certain muscles slightly or perform other simple actions. The electrical activity of the muscle will be recorded on a computer through electrodes taped to the skin over the muscle. In most cases, the study will last less than 3 hours. Participants will also fill out questionnaires about aspects of personality and will be tested for their ability to perform certain cognitive (thinking) and movement tasks. Patients with Parkinson's disease will, in addition, be administered the Uniform Parkinson's Disease Rating Scale to measure disease severity.

Patients will be requested to stop all Parkinson's disease medications 12 hours before the study. They may resume medications immediately after the study. Patients who so wish may be admitted to the hospital the day or evening before the study while they are off medications and stay there until they feel ready to leave.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

Paired pulse transcranial magnetic stimulation (TMS) provides a measure of the balance of inhibitory and facilitatory activity evokable in the motor cortex. Studies in several diverse disorders of basal ganglia outflow and cortical regulation show an alteration in the direction of decreased inhibition or increased facilitation. In general, these have been quite small, data from different interstimulus intervals have been pooled for analysis, and, therefore, disease and state-specific information may have been missed. A deeper understanding of what this technique can tell us about pathological and normal cortical regulation requires detailed studies within populations looking for correlations between physiological and clinical/behavioral variables and large, uniform, head-to-head comparisons between clinical populations. This proposal contains a project that combines the correlational and comparative approaches in Parkinson's disease and healthy individuals. Data from this project will then be comparable to future similar studies in other disorders.

Studietyp

Observationell

Inskrivning

80

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • Maryland
      • Bethesda, Maryland, Förenta staterna, 20892
        • National Institute of Neurological Disorders and Stroke (NINDS)

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Barn
  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

INCLUSION CRITERIA:

Patients:

Patients with established, dopa-responsive PD, Hoehn and Yahr stage I-III, age 21 and older will be included.

Patients will be recruited from the NINDS HMCS and ETB clinical programs and from the community.

Healthy Controls:

Healthy controls 21 and older will be recruited through the NIH Clinical Research Volunteer Program and from the community.

EXCLUSION CRITERIA:

Exclusionary criteria will be: any significant medical or psychiatric illness (other than PD), pregnancy, history of epilepsy, concurrent use of tricyclic antidepressants, neuroleptic agents, or any other licit or illicit drugs that could lower the seizure threshold or significantly affect cortical excitability.

Persons with surgically or traumatically implanted foreign bodies in the head (other than dental appliances of fillings) that may pose a physical hazard during magnetic stimulation will also be excluded.

Patients:

Patients with persistent "resting" tremor that precludes testing at rest may be excluded as well as any patient to whom the screening physician makes a judgment that withdrawal of medications poses a significant risk due to immobility or risk of falling.

Patients on long-acting dopamine agonists will also be excluded.

Patients in Hoehn and Yahr stage IV will also be excluded, since they are least likely to tolerate medication withdrawal and are also unlikely to be able to maintain muscle relaxation for TMS testing.

No significant medical or psychiatric illness (other than PD), pregnancy, history of epilepsy, concurrent use of tricyclic antidepressants, neuroleptic agents, or any other licit or illicit drugs that could lower the seizure threshold or significantly affect cortical excitability.

Must not have surgically or traumatically implanted foreign bodies in the head (other than dental appliances or fillings) that may pose a physical hazard during magnetic stimulation.

HEALTHY CONTROLS:

Ages 21 and older will be recruited through the NIH Clinical Research Volunteer Program (CRVP) and from the community.

All individuals will be processed through the CRVP before participating. Recruitment will be focused on optimizing age, sex, educational, and racial matching with patient group. Patients' spouses will be invited to participate.

No significant medical or psychiatric illness (other than PD), pregnancy, history of epilepsy, concurrent use of tricyclic antidepressants, neuroleptic agents, or any other licit or illicit drugs that could lower the seizure threshold or significantly affect cortical excitability.

Must not have surgically or traumatically implanted foreign bodies in the head (other than dental appliances or fillings) that may pose a physical hazard during magnetic stimulation.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

National Institute of Neurological Disorders and Stroke (NINDS)

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 augusti 2001

Avslutad studie

1 augusti 2003

Studieregistreringsdatum

Först inskickad

22 augusti 2001

Först inskickad som uppfyllde QC-kriterierna

22 augusti 2001

Första postat (Uppskatta)

23 augusti 2001

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

4 mars 2008

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

3 mars 2008

Senast verifierad

1 augusti 2003

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 010240
  • 01-N-0240

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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