Self-organization model on receptive field of neuron with asymmetric time window of synaptic modification

The spatial-temporal response properties of some simple neurons in visual p athway arise basically prior to birth. In the absence of visual experience, how do these neurons develop in visual system? Based on Wimbauer network w ith delay, a four-layer feed-forward network model is proposed, which is ch aracterized by modifying the Hebb learning rule through introducing the asy mmetric time window of synaptic modification found recently in neurobiology . The model can not only generate by self-organization more diversified spa tial-temporal response characteristics of neuronal receptive field than ear lier models but also provide some explanations for the possible mechanism u nderlying the development of receptive fields of contrast polarity sensitiv e neurons found in visual system of vertebrate. Thus the proposed model may be more widely applicable than Linsker model and Wimbauer model.