Evidence map›Paper›PMID 38969754›Full record

ArticleEuropean archives of psychiatry and clinical neuroscience2025

What Chemsex does to the brain - neural correlates (ERP) regarding decision making, impulsivity and hypersexuality.

Johanna Schwarz, Marcus Gertzen, Andrea Rabenstein, Moritz Straßburger, Alana Horstmann, Oliver Pogarell, Tobias Rüther, Susanne Karch

Abstract read
In one paragraph

Article in European archives of psychiatry and clinical neuroscience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–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

7 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Neurocognitive challenges Post-COVID: current perspectives and future solutions.European archives of psychiatry and clinical neuroscience · 2025
    Article
  6. Article
  7. 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

8 authors.

Johanna Schwarz *Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany. J.Schwarz@med.uni-muenchen.de.ORCID http://orcid.org/0009-0000-4674-8792
Marcus Gertzen *Department of Psychiatry, Psychotherapy, and Psychosomatics, Medical Faculty, University of Augsburg, Augsburg, Germany.
Andrea RabensteinDepartment of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.
Moritz StraßburgerDepartment of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.
Alana HorstmannDepartment of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.
Oliver PogarellDepartment of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.
Tobias Rüther *Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.
Susanne Karch *Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chemsex describes the use of specific substances (methamphetamine, GHB/GBL, mephedrone, ketamine) which initiate or enhance sexual experiences and is mainly prevalent among men who have sex with men. Many Chemsex users experience somatic complications (for example sexually transmitted diseases) and sometimes adverse sociological, psychological, and neurological symptoms, such as depression, impulse control disorders or hypersexuality. Changes in impulsivity and deficits in executive functions have demonstrated to be associated with addiction and impulse control disorders as well as frontal brain dysfunction and behavioral control deficits. This study aims to explore the effects of neurophysiological correlates of inhibition and decision making in Chemsex users with an EEG paradigm using event-related potentials (N2, P3). 15 Chemsex users and 14 matched control subjects, all of them men who have sex with man, participated in an auditory Go/NoGo/Voluntary Selection EEG paradigm. In addition, clinical data (e.g. regarding depression), demographic information as well as measures of well-being and sexual behavior were collected. The results demonstrated that clinical symptoms, hypersexuality, and sexual risk behavior were more pronounced in Chemsex users compared to non-users. P3 amplitudes did not differ significantly between groups. However, the Chemsex users showed decreased electrophysiological N2 responses in fronto-central brain regions during decision-making, indicating compromised executive function and inhibitory control. The observed impairments may lead to increased risk behavior regarding drug abuse and hypersexuality. Understanding the neurobiological mechanisms can contribute to targeted interventions in order to mitigate the negative consequences of engaging in Chemsex and improve general well-being.

Indexed as

BrainDecision MakingEvoked PotentialsIllicit DrugsImpulsive BehaviorSexual BehaviorSubstance-Related DisordersAdultChemsexElectroencephalographyHomosexuality, MaleHumansKetamineMaleMethamphetamineYoung AdultIllicit DrugsKetamineMethamphetamineChemsexExecutive functionsHypersexualityInhibitionNeurophysiological correlates

Identifiers

PMID38969754
PMCPMC11799082

What Socratic holds

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Registered trials

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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 Socratic graph.