Context-invariance by feedback-driven modulation

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Laura Bella Naumann , Joram Keijser

Context-invariance in sensory processing is often believed to arise from hierarchical feedforward processing. However, sensory processing is also affected by feedback projections, even at the early stages. In this project we explore the hypotehsis that feedback-driven modulation of feedforward processing can enable context-invariant perception. By training network models with feedback modulation, we investigate whether the required spatial and temporal scale of the suggested mechanism is compatible with biological neuromodulation. The goal of this project is to propose an active role of feedback modulation in sensory processing and determine how the mechanism could be dissociated in the brain.