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Poster Session A: Tuesday, August 12, 1:30 – 4:30 pm, de Brug & E‑Hall

Behavioural markers of recurrent processing in the brain

Timothee Maniquet¹, Hans Op de Beeck¹; ¹KU Leuven

Presenter: Timothee Maniquet

The human brain processes visual input quickly and reliably, even in the face of large perturbations in visual input. How cortical computations solve object identity under complex visual changes is not well explained by current models. Recent work using deep neural networks (DNNs) points to recurrent processing, with models shown to be more resilient to visual complexity when equipped with recurrent connections. Here, we explore recurrent processing, and ask whether we can pinpoint the substrates of these computations in the brain. We design a stimulus set including visual manipulations known to trigger recurrent processing, from which we establish a behavioural benchmark of performance markers of recurrent processing. We then record fMRI on participants tasked with classifying the images from this stimulus set, and compare our benchmark markers with cortical representations. Preliminary results using this approach indicate that regions in the prefrontal cortex as potential candidates for hubs of recurrent connectivity in the context of challenging object recognition.

Topic Area: Visual Processing & Computational Vision

Extended Abstract: Full Text PDF