The brain's sequential parallelism: perceptual decision-making and early sensory responses

Authors:
Tobias Brosch;Heiko Neumann
Affiliations:
Ulm University, Germany;Ulm University, Germany
Venue:
ICONIP'12 Proceedings of the 19th international conference on Neural Information Processing - Volume Part II
Year:
2012

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Abstract

Multi-stage decision tasks require the determination of intermediate results in order to perform consecutive decision steps. Electrophysiological recordings in sensory, parietal, and pre-frontal cortical areas have demonstrated that different response characteristics and timings at the neuron level provide key mechanisms to implement characteristic functionalities. We propose a hybrid neural model architecture that accounts for such findings and quantitatively reproduces the timing of such responses. We demonstrate by numerical simulations how the model accounts for feature-dependent decisions and how these are sequentialized during mutual interactions of pools of neurons in different cortical areas. Feedback from higher-level areas to early sensory stages of processing establishes a link between mechanisms involved in response integration and target selection to representations of sensory input.