Evidence map›Paper›PMID 31532768›Full record

ArticlePloS one2019

The effect of cathodal tDCS on fear extinction: A cross-measures study.

Ana Ganho-Ávila, Óscar F Gonçalves, Raquel Guiomar, Paulo Sérgio Boggio, Manish Kumar Asthana, Angelos-Miltiadis Krypotos, Jorge Almeida

Abstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Does non-invasive brain stimulation modulate emotional stress reactivity?Social cognitive and affective neuroscience · 2020
    Pooled it
  3. Trial
  4. Trial
  5. Trial
  6. Review
  7. Neuromodulation of Fear and Anxiety Circuits.Current topics in behavioral neurosciences · 2025
    Review
  8. Article
  9. Prefrontal cortex, amygdala, and threat processing: implications for PTSD.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2022
    Review
  10. Article
  11. Review
  12. Article
  13. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ana Ganho-ÁvilaProaction Laboratory, Cognitive and Behavior Center for Research and Intervention Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal.ORCID 0000-0001-5355-6166
Óscar F GonçalvesNeuropsychophysiology Lab, CiPsi, School of Psychology, University of Minho, Braga, Portugal.
Raquel GuiomarProaction Laboratory, Cognitive and Behavior Center for Research and Intervention Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal.ORCID 0000-0001-9611-1167
Paulo Sérgio BoggioSocial and Cognitive Neuroscience Laboratory and Developmental Disorders Program, Center for Health and Biological Sciences, Mackenzie Presbyterian University, São Paulo, Brazil.
Manish Kumar AsthanaSocial and Cognitive Neuroscience Laboratory and Developmental Disorders Program, Center for Health and Biological Sciences, Mackenzie Presbyterian University, São Paulo, Brazil.
Angelos-Miltiadis KrypotosDepartment of Clinical Psychology, Utrecht University, Utrecht, the Netherlands.
Jorge AlmeidaProaction Laboratory, Cognitive and Behavior Center for Research and Intervention Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundExtinction-based procedures are often used to inhibit maladaptive fear responses. However, because extinction procedures show efficacy limitations, transcranial direct current stimulation (tDCS) has been suggested as a promising add-on enhancer.

objectiveIn this study, we tested how cathodal tDCS over the right dorsolateral prefrontal cortex affects extinction and tried to unveil the processes at play that boost the effectiveness of extinction procedures and its translational potential to the treatment of anxiety disorders.

methodsWe implemented a fear conditioning paradigm whereby 41 healthy women (mean age = 20.51 ± 5.0) were assigned to either cathodal tDCS (n = 27) or sham tDCS (n = 16). Fear responses were measured with self-reports, autonomic responses, and implicit avoidance tendencies.

resultsCathodal tDCS shows no statistically significant effect in extinction, according to self-reports, and seems to even negatively affect fear conditioned skin conductance responses. However, one to three months after the tDCS session and extinction, we found a group difference in the action tendencies towards the neutral stimuli (F (1, 41) = 12.04, p = .001, ηp2 = .227), with the cathodal tDCS group (as opposed to the sham group) showing a safety learning (a positive bias towards the CS-), with a moderate effect size. This suggests that cathodal tDCS may foster stimuli discrimination, leading to a decreased generalization effect. DISCUSSION: Cathodal tDCS may have enhanced long-term distinctiveness between threatening cues and perceptively similar neutral cues through a disambiguation process of the value of the neutral stimuli-a therapeutic target in anxiety disorders. Future studies should confirm these results and extend the study of cathodal tDCS effect on short term avoidance tendencies.

Indexed as

AdolescentAdultAvoidance LearningConditioning, ClassicalExtinction, PsychologicalFearFemaleHumansPrefrontal CortexSelf ReportTranscranial Direct Current StimulationYoung Adult

Identifiers

PMID31532768
PMCPMC6750569

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.