Modal behavior of cortical neural networks during visual processing.

D M Senseman; K A Robbins

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PubMed · 10234049

Modal behavior of cortical neural networks during visual processing.

D M Senseman·K A Robbins

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Abstract

The network behavior of cortical cells during the processing of a light flash was characterized in an isolated, but functionally intact, turtle visual system. Rapid changes in intracellular membrane potential were monitored optically using a voltage-sensitive dye (VSD). Spatially coherent changes in membrane potential were determined by subjecting high-speed movies of the VSD signals to Karhunen-Loéve decomposition. In all experimental trials analyzed (n > 50), coherent activity was restricted to a small number of similar spatial patterns or modes. At least four modes (M(1,1), M(1,2), M(2,1), and M(2,2)) have an organizational structure similar to the normal modes of a vibrating membrane (drum). This empirical observation of modal activity provides a useful framework for analyzing the macroscopic behavior of cortical networks.

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Animals Cerebral Cortex Evoked Potentials, Visual Mathematics Membrane Potentials Models, Neurological Nerve Net Photic Stimulation Turtles Visual Perception Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.Research Support, U.S. Gov't, P.H.S.

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D M Senseman, K A Robbins. 1999-05-15. Modal behavior of cortical neural networks during visual processing.. https://pubmed.ncbi.nlm.nih.gov/10234049/

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