IWANN 2001: Connectionist Models of Neurons, Learning Processes, and Artificial Intelligence pp 81-86 | Cite as
Sensitivity of Simulated Striate Neurons to Cross-Like Stimuli Based on Disinhibitory Mechanism
Abstract
Sensitivity of simulated striate neurons to the crosses of different shape and orientation was studied in a two-layered neural network which consisted of formal neurons with end-stopping inhibitory and disinhibitory zones in the receptive field. We evaluated the output responses of neurons under variation of a cross size, shape, orientation. It was shown that disinhibitory mechanism could explain neuronal sensitivity to cross-like figures. The tuning of the simulated neurons calculated from their output responses reproduced the characteristic features of the natural units in the cat striate cortex. It was shown which combinations of the relative shape, localization and weight of the excitatory, end-stopping and disinhibitory zones of the simulated receptive field allow to imitate a selective or an invariant tuning to a cross-like figure of the real neurons in the cat primary visual cortex.
Keywords
Receptive Field Input Matrix Orientation Tuning Network Mechanism Formal NeuronPreview
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