Cellular psychology: relating cognition to context-sensitive pyramidal cells

Trends in Cognitive Sciences, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

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How the brain learns to parse images using an attentional, incremental grouping process

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: June 17, 2024

Abstract Natural scenes usually contain a vast number of objects that need to be segmented and segregated from each other the background guide behaviour. In visual brain, object-based attention is process by which image fragments belonging same are grouped together. The curve-tracing task special case perceptual grouping tests our ability group elements an elongated curve. consists in determining belong curve, neurons spread enhanced activity level over representation relevant A previous “growth-cone model attention” accounted for scale invariance tracing proposing propagates at multiple levels cortical hierarchy. However, precise neuronal circuitry learning implementing scale-invariant remains unknown. We propose new recurrent architecture labelling curves objects. composed feedforward pathway dynamically selects right prevents spilling curves, tag spreading involves horizontal feedback interactions, mediated disinhibitory loop involving VIP SOM interneurons. trained network with up seven pixels long using reinforcement rule local time space we found it generalized any length spatially extended chose appropriate switched higher or lower scales as dictated distance between just has been observed human psychophysics cortex monkeys. Our work provide mechanistic account brain. Significance Statement Objects labelled via activity. If dynamics propagations this well characterised, unknown what neural architectures rules can produce those dynamics. This first reward give rises monkeys’ reaction times, shedding light on mechanisms multiscale cortex.

Language: Английский

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Accentuation, Boolean maps and perception of (dis)similarity in a neural model of visual segmentation

Vision Research, Journal Year: 2024, Volume and Issue: 225, P. 108506 - 108506

Published: Nov. 1, 2024

Language: Английский

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