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A model for feature linking via collective oscillations in the primary visual cortex

✍ Scribed by Tsuyoshi Chawanya; Toshio Aoyagi; Ikuko Nishikawa; Koji Okuda; Yoshiki Kuramoto

Publisher: Springer-Verlag
Year: 1993
Tongue: English
Weight: 780 KB
Volume: 68
Category: Article
ISSN: 0340-1200
DOI: 10.1007/bf00200807

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✦ Synopsis

A neural network model for explaining experimentally observed neuronal responses in cat primary visual cortex is proposed. In our model, the basic functional unit is an orientation column which is represented by a large homogeneous population of neurons modeled as integrate-and-fire type excitable elements. The orientation column exhibits spontaneous collective oscillations in activity in response to suitable visual stimuli. Such oscillations are caused by mutual synchronization among the neurons within the column. Numerical simulation for various stimulus patterns shows that as a result of activity correlations between different columns, the amplitude and the phase of the oscillation in each column depend strongly on the global feature of the stimulus pattern. These results satisfactorily account for experimental observations.

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