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  • Title: Competitive dynamics in cortical responses to visual stimuli.
    Author: Moldakarimov S, Rollenhagen JE, Olson CR, Chow CC.
    Journal: J Neurophysiol; 2005 Nov; 94(5):3388-96. PubMed ID: 15944239.
    Abstract:
    Neurons in the visual cortex of the macaque monkey exhibit a variety of competitive behaviors, including normalization and oscillation, when presented with multiple visual stimuli. Here we argue that a biophysically plausible cortical circuit with opponent inhibition, spike-frequency adaptation, and synaptic depression can account for the full range of behaviors. The governing parameter is the strength of inhibition between competing neuronal pools. As the strength of inhibition is increased, the pattern of network behavior shifts from normalization mode to oscillatory mode, with oscillations occurring at progressively lower frequency until, at the extreme, winner-take-all behavior appears.
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