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Doctoral thesis
English

Orbitofrontal reality filtering: the role of ambiguity

Defense date2021-02-11
Abstract

Orbitofrontal Reality Filtering (ORFi) denotes a cognitive process that allows our thoughts and behaviors to be congruent with the ongoing reality. ORFi appears to use a mechanism signaling when an anticipation is now invalid. It intervenes at an early stage of processing, at 200-300 ms, and is associated with activation of the posterior medial OFC. However, situations involving ambiguity may render it difficult to determine when previous anticipations are no longer valid. In the present thesis, we investigate how precisely the brain deals with such ambiguous situations. We first showed that the brain uses at least two distinct processes evaluating the absence of anticipated outcomes with unequivocal or ambiguous behavioral relevance. We next showed that the OFC flexibly adjusts the processing of outcomes depending on whether they require or not behavioral adaptation in the present context.

engfre
Keywords
  • Neurosciences
  • Reality confusion
  • Confabulations
  • Orbitofrontal cortex
  • Orbitofrontal reality filtering
  • Decision making
  • Behavioral extinction
  • Outcome processing
  • Outcome ambiguity
  • Prediction error
  • Electroencephalography
NoteDiplôme commun des univ. de Genève et Lausanne. Thèse de doctorat des Universités de Genève et Lausanne
Citation (ISO format)
HABIBY ALAOUI, Sélim. Orbitofrontal reality filtering: the role of ambiguity. 2021. doi: 10.13097/archive-ouverte/unige:150545
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Creation03/12/2021 1:50:00 PM
First validation03/12/2021 1:50:00 PM
Update time03/05/2024 2:52:29 PM
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