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Global processing of visual stimuli in a neural network of coupled oscillators

An oscillator neural network model is presented that is capable of processing local and global attributes of sensory input. Local features in the input are encoded in the average firing rate of the neurons while the relationships between these features can modulate the temporal structure of the neuronal output. Neurons that share the same receptive field interact via relatively strong feedback connections, while neurons with different fields interact via specific, relatively weak connections. This pattern of connectivity mimics that of primary visual cortex. The model is studied in the context of processing visual stimuli that are coded for orientation. We compare our theoretical results with recent experimental evidence on coherent oscillatory activity in the cat visual cortex. The computational capabilities of the model for performing discrimination and segmentation tasks are demonstrated.

Authors: Sompolinsky H, Golomb D, Kleinfeld D.

Year of publication: 1990

Journal: Proc Natl Acad Sci U S A. 1990 Sep;87(18):7200-4.

Link to publication:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC54711

Labs:

Haim Sompolinsky

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