Naturalistic use of psychedelics does not modulate processing of self‐related stimuli (but it might modulate attentional mechanisms): An event‐related potentials study

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Orłowski, Paweł
Hobot, Justyna
Ruban, Anastasia
Szczypiński, Jan
Bola, Michał
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Date
2024-04-07
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Psychophysiology
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0048-5772
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https://onlinelibrary.wiley.com/doi/10.1111/psyp.14583?af=R
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2024-04-07
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Abstract EN
Classic psychedelics are able to profoundly alter the state of consciousness and lead to acute experiences of ego dissolution – the blurring of the distinction between representations of self and the external world. However, whether repeated use of psychedelics is associated with more prolonged and permanent modifications to the concept of self remains to be investigated. Therefore, we conducted a preregistered, cross-sectional study in which experienced psychedelics users (15 or more lifetime experiences with psychedelics; N = 56) were compared to nonusers (N = 57) in terms of neural reactivity to a Self-name (i.e., each participant's own name) stimulus, which is known to robustly activate a representation of self. Two control stimuli were additionally used: an Other-name stimulus, as a passive control condition in which no reaction was required, and a Target-name stimulus, to which participants provided a manual response and which thus constituted an active control condition. Analysis of the amplitude of the P300 ERP component evoked by the Self- or Target-names revealed no difference between the psychedelics users and nonusers. However, psychedelic users exhibited increased P300 amplitude during perception of Other-names. In addition, in comparison to nonusers, psychedelics users exhibited a smaller increase in P300 amplitude when processing the task-relevant Target-names (in relation to both Self- and Other-names). Therefore, our data suggests that regular naturalistic use of psychedelics may not be related to long-term changes in the representation of self, but it might potentially affect the allocation of attentional resources to task-relevant stimuli.
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Keywords PL
Keywords EN
electroencephalography (EEG)
naturalistic use of psychedelics
P300
psychedelics
self- perception
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https://share.swps.edu.pl/handle/swps/673
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Neuronalne mechanizmy kontroli zachowania i teorii umysłu u mężczyzn ze skłonnościami pedofilnymi
Samoświadomość i przetwarzanie emocji w grupie użytkowników klasycznych psychodelików
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