Denna sida har översatts automatiskt och översättningens korrekthet kan inte garanteras. Vänligen se engelsk version för en källtext.

tDCS-Augmented Exposure Therapy for Pathological Fear

4 december 2020 uppdaterad av: Michael J. Telch, University of Texas at Austin
This double-blind randomized controlled clinical trial aims to test whether transcranial direct current stimulation (tDCS) can be used to modulate fear extinction learning during exposure therapy for pathological fear, including fear of spiders, snakes, or germs / contamination. Participation takes place over three laboratory visits, including (1) a pre-treatment visit, (2) a treatment and post-treatment visit, and (3) a 1 month follow-up visit. During treatment, participants will receive either 20 minutes of active or sham tDCS, followed by 30 minutes of in vivo exposure therapy.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

In a trans-diagnostic sample with marked pathological fear and behavioral avoidance, this study aims to: (1) evaluate whether excitatory tDCS of the mPFC and inhibitory tDCS of right dlPFC enhances exposure therapy relative to sham tDCS; (2) determine whether tDCS effects are moderated by baseline negative prognostic indicators; and (3) determine whether tDCS effects are mediated by pre-post changes in vigilance to threat, in-session fear reduction, and contextual memory for the exposure context. If successful, the project may discover a potentially effective exposure therapy augmentation, and may enhance knowledge of the behavioral, cognitive, affective, and neurobiological factors that moderate and mediate acute treatment response and maintenance of treatment gains. This knowledge may inform treatment development efforts for more debilitating forms of pathological fear.

Studietyp

Interventionell

Inskrivning (Faktisk)

49

Fas

  • Inte tillämpbar

Kontakter och platser

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

Studieorter

  • Förenta staterna
    • Texas
      • Austin, Texas, Förenta staterna, 78712
        • Laboratory for the Study of Anxiety Disorders

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

18 år till 65 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  1. Age 18-65.
  2. Fluent in English.
  3. A score on at least 1 fear domain-specific prescreen measure > 2 SDs above the subject pool prescreen mean. These measures include (a) FSQ, and (b) OCI-R.
  4. Peak fear ≥ 50 on BATs 1 and 2.

Exclusion Criteria:

  1. Currently receiving treatment for the primary fear domain (based on clinical interview).
  2. Unstable dose of psychotropic medications within 6 weeks prior to baseline assessment (based on the DMQ; see measures).
  3. Medical condition that would contraindicate participation in treatment or assessment activities (e.g., cardiovascular problems; based on the DMQ; see measures).
  4. Pregnancy (based on the DMQ; see measures).
  5. Current major depressive disorder (based on MINI; see measures).
  6. Current, or history of bipolar disorder (based on MINI; see measures).
  7. Current, or history of psychotic symptoms (based on MINI; see measures).
  8. Serious suicidal risk, as determined by self-report (C-SSRS, BDI-II) and clinical interview (MINI; see measures).
  9. Active neurological conditions, including seizures, stroke, unexplained loss of consciousness or concussion (based on DMQ and tDCS Safety Screening Form; see measures)
  10. Contraindications for tDCS: Metal in the head or implanted brain medical devices.

Studieplan

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

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Fyrdubbla

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Aktiv komparator: Active tDCS + In Vivo Exposure
Participants assigned to this condition will receive excitatory transcranial direct current stimulation (tDCS) of the left medial prefrontal cortex (lmPFC) and inhibitory tDCS of right dorsolateral prefrontal cortex (rdlPFC). tDCS will be administered for 20 minutes at 1.7 mA, followed by 30 minutes of in vivo exposure therapy.
Enhet: Transcranial Direct Current Stimulation (tDCS)
Participants will receive 20 minutes of either active or sham tDCS prior to in vivo exposure to feared targets.
Beteende: In vivo exposure therapy
Participants will receive 30 minutes of in vivo exposure to feared targets following either active or sham tDCS
Sham Comparator: sham tDCS + In Vivo Exposure
Participants assigned to this condition will receive sham transcranial direct current stimulation (tDCS), which will consist of 30 seconds of stimulation at the beginning and end of tDCS administration. Electrode positioning will be counterbalanced across participants (i.e., either mPFC+ or mPFC-, with same electrode positioning as the active comparators). Sham tDCS will be administered for 20 minutes, followed by 30 minutes of in vivo exposure therapy.
Beteende: In vivo exposure therapy
Participants will receive 30 minutes of in vivo exposure to feared targets following either active or sham tDCS

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in peak fear during two behavioral approach tasks across time-points.
Tidsram: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Subjective units of distress from 0 = no fear, to 100 = extreme fear
Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Change in approach level during two behavioral approach tasks across time points.
Tidsram: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Highest difficulty level achieved from 0 = least challenging to 10 = most challenging.
Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in arachnophobia symptom severity across time-points
Tidsram: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Total score on the Fear of Spiders Questionnaire
Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Change in ophidophobia symptom severity across time-points
Tidsram: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Total score on the Fear of Snakes Questionnaire
Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Change in germaphobia / contamination fear symptom severity across time points.
Tidsram: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Total score on the Obsessive Compulsive Inventory - Revised.
Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
Threat vigilance task
Tidsram: Before and after tDCS administration (1 week after baseline)
Computer-based task that assesses attention biases towards and away from threatening images.
Before and after tDCS administration (1 week after baseline)
Visuospatial working memory task
Tidsram: Before and after tDCS administration (1 week after baseline)
Delayed match to sample task assessing recognition of 4 x 4 arrays of colored blocks, after a brief delay.
Before and after tDCS administration (1 week after baseline)
Incidental contextual memory task
Tidsram: Stimulus presented during in vivo exposure (1 week after baseline), and memory assessed at follow-up (1 month after treatment)
Assessment of incidental memory for a 4 x 4 array of line drawings from the Test of Memory Malingering, presented in the treatment context only during in vivo exposure.
Stimulus presented during in vivo exposure (1 week after baseline), and memory assessed at follow-up (1 month after treatment)

Samarbetspartners och utredare

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

Sponsor

University of Texas at Austin

Utredare

  • Huvudutredare: Adam R. Cobb, Ph.D., The University of Texas at Austin
  • Studierektor: Michael J. Telch, PhD, The University of Texas at Austin

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.

Användbara länkar

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 (Faktisk)

1 januari 2017

Primärt slutförande (Faktisk)

6 september 2018

Avslutad studie (Faktisk)

6 september 2018

Studieregistreringsdatum

Först inskickad

20 mars 2017

Först inskickad som uppfyllde QC-kriterierna

23 mars 2017

Första postat (Faktisk)

29 mars 2017

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

8 december 2020

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

4 december 2020

Senast verifierad

1 december 2020

Mer information

Termer relaterade till denna studie

Nyckelord

Andra studie-ID-nummer

  • 2016-02-0024

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

Obeslutsam

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

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 .

Kliniska prövningar på Transcranial Direct Current Stimulation (tDCS)

Sök liknande försök

Sponsorer och medarbetare

Medicinska tillstånd

Läkemedelsinterventioner

CROs by country

CROs in Macedonia

Betingelser

Sällsynta sjukdomar

Läkemedelsinterventioner

Kosttillskott

Sponsor / medarbetare

Platser

Prenumerera