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| Item Type: | Article |
|---|---|
| Title: | MEG reveals preference specific increases of sexual-image-evoked responses in paedophilic sexual offenders and healthy controls |
| Creators: |
Krylova, M.  ORCID: https://orcid.org/0000-0001-7447-3976, Ristow, I. ORCID: https://orcid.org/0000-0002-3032-2321, Marr, V., Borchardt, V. ORCID: https://orcid.org/0000-0003-4928-051X, Li, M. ORCID: https://orcid.org/0000-0002-8320-5241, Witzel, J., Drumkova, K., Harris, J.A., Zacharias, N. ORCID: https://orcid.org/0000-0001-5794-5716, Schiltz, K., Amelung, T. ORCID: https://orcid.org/0000-0002-7930-4204, Beier, K.M., Kruger, T.H.C. ORCID: https://orcid.org/0000-0002-6583-1433, Ponseti, J., Schiffer, B. ORCID: https://orcid.org/0000-0002-6935-8903, Walter, H. ORCID: https://orcid.org/0000-0002-9403-6121, Kärgel, C. and Walter, M. ORCID: https://orcid.org/0000-0001-7857-4483
|
| Abstract: | OBJECTIVES: Paedophilic disorder is characterized by sexual attraction towards children. Classification of a counterpart as sexually attractive likely occurs rapidly, and involves both conscious and unconscious attentional and cognitive processes. Magnetoencephalography (MEG) is an imaging method especially well-suited to examine visual and attentional processes triggered by sexual images within the range of milliseconds. METHODS: We investigated brain responses to sexual images depicting adults (frequent) and children (infrequent stimulus) in seventeen paedophilic patients with a history of child sexual offending (P + CSO) and twenty healthy controls (HC) during a passive visual oddball paradigm. Event-related fields (ERF) were measured to extract the magnetic visual mismatch negativity (vMMNm), and how it relates to the processing of different classes of sexual stimuli. RESULTS: P + CSO exhibited significantly longer vMMNm latencies (100-180ms post-stimulus) than HC. Moreover, P + CSO showed widespread increased amplitudes in response to child images starting from P3a and P3b components and lasting up to 400ms post-stimulus presentation localized in frontal and temporal brain regions. CONCLUSIONS: This study uncovers the first MEG differences in automatic change detection between P + CSO and HC during the presentation of subliminal sexual images of adults and children, contributing towards a better understanding of the neurobiological processes of P + CSO. |
| Keywords: | Attention, Brain Imaging, Event-Related Brain Potentials, Magnetoencephalography, Paedophilia |
| Source: | World Journal of Biological Psychiatry |
| ISSN: | 1562-2975 |
| Publisher: | Taylor & Francis |
| Volume: | 22 |
| Number: | 4 |
| Page Range: | 257-270 |
| Date: | April 2021 |
| Official Publication: | https://doi.org/10.1080/15622975.2020.1789216 |
| PubMed: | View item in PubMed |
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