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Rôle de la mise à jour égocentrée dans la mémoire épisodique

Abstract : Episodic memory binds various elements in a specific spatial and temporal context. During retrieval, disparate neocortical elements can be re-associated into a coherent episode due to an allocentric spatial context maintained within the hippocampal formation (ie, coding for object-to-object relations, independently of the individual‟s position, Burgess, Becker, King, & O‟Keefe, 2001, Nadel & Moscovitch, 1998). Phenomenological experience is characteristic of episodic memory. In this thesis, it is described as an individual‟s attribution to a fluency in processing egocentric-updating spatial information (i.e., the position, orientation and movement of one‟s body) during retrieval. The function of egocentric-updating and of allocentric spatial processing in episodic memory was assessed experimentally. Results demonstrate the presence of a causal link between egocentric-updating and episodic memory performance. Moreover, experiments showed cerebral and behavioural specificities of egocentric-updating spatial processing supporting its involvement in episodic memory. Additionally, in line with this distinction between allocentric and egocentric-updating spatial processing, neuropsychological experiments revealed deficits in egocentric-updating with a preservation of allocentric spatial processing in both acquired and developemental bi-hippocampal amnesia. Finally, the assessment of cerebral consequences of encoding an episode while maximizing egocentric-updating processes revealed a higher involvement of temporo-parietal regions during the subsequent episodic retrieval. This thesis work was structured over an original theoretical model on episodic memory functioning allowing new experimental predictions. Combining behavioural, neuropsychological and neuroimaging approaches raised in turn new questions concerning links between episodic memory and self-consciousness.
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Submitted on : Monday, July 25, 2011 - 10:13:05 AM
Last modification on : Friday, November 6, 2020 - 3:22:57 AM
Long-term archiving on: : Wednesday, October 26, 2011 - 2:20:54 AM


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  • HAL Id : tel-00610837, version 1



Alice Gomez. Rôle de la mise à jour égocentrée dans la mémoire épisodique. Psychologie. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENS012⟩. ⟨tel-00610837⟩



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