Age-related differences in electrophysiological correlates of visuospatial reorientation

Naveilhan, Clément; Delaux, Alexandre; Durteste, Marion; Lebrun, Jerome; Zory, Raphaël; Arleo, Angelo; Ramanoël, Stephen

doi:10.1101/2023.11.22.568209

Cited by 1 publication

(1 citation statement)

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“…This sample size was determined by a priori power analysis using G*Power (version 3.1.9.7; Faul et al, 2007). The power analysis was based on data from a previous ERP study investigating behavioral and neural differences between young and older adults during a landmark-based reorientation task contrasted with a passive scene perception (Naveilhan et al, 2023). Analysis of the young participants’ data indicated that a minimum of 23 participants was required to achieve a power of 0.95 at an alpha level of 0.05.…”

Section: Methodsmentioning

confidence: 99%

Spatial contextual information modulates affordance processing and early electrophysiological markers of scene perception

Naveilhan,

Saulay-Carret,

Zory

et al. 2024

Preprint

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Scene perception allows humans to extract information from their environment and plan navigation efficiently. The automatic extraction of potential paths in a scene, also referred to as navigational affordances is supported by scene-selective regions (SSRs) that enable efficient human navigation. Recent evidence suggests that the activity of these SSRs can be influenced by information from adjacent spatial memory areas. However, it remains unexplored how these contextual information could influence the extraction of bottom-up information, such as navigational affordances, from a scene and the underlying neural dynamics. Therefore, we analyzed event-related potentials (ERPs) in 26 young adults performing scene and spatial memory tasks in artificially generated rooms with varying numbers and locations of available doorways. We found that increasing the number of navigational affordances only impaired performance in the spatial memory task. ERP results showed a similar pattern of activity for both tasks, but with increased P2 amplitude in the spatial memory task compared to the scene memory. Finally, we reported no modulation of the P2 component by the number of affordances in either task. This modulation of early markers of visual processing suggests that the dynamics of SSR activity are influenced by a priori knowledge, with increased amplitude when participants have more contextual information about the perceived scene. Overall, our results suggest that prior spatial knowledge about the scene, such as the location of a goal, modulates early cortical activity associated with scene-selective regions, and that this information may interact with bottom-up processing of scene content, such as navigational affordances.

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Section: Methodsmentioning

confidence: 99%