A neurobiological theory of meaning in perception. Part 1. Information and meaning in nonconvergent and nonlocal brain dynamics

A neurobiological theory of meaning in perception. Part 1. Information and meaning in nonconvergent and nonlocal brain dynamics (2003)

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by Synchrony Among Multicortical Eegs Freeman , Walter J Freeman , Gyöngyi Gaál , Rebecka Jornsten

Venue:	Int. J. Bifurc. Chaos
Citations:	20 - 10 self

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Datum	Value	Source
TITLE	A neurobiological theory of meaning in perception. Part 1. Information and meaning in nonconvergent and nonlocal brain dynamics	INFERENCE
AUTHOR NAME	Synchrony Among Multicortical Eegs Freeman	SVM HeaderParse 0.2
AUTHOR NAME	Walter J Freeman	SVM HeaderParse 0.2
AUTHOR AFFIL	† Present address:; Neuroprosthesis Research Organization	SVM HeaderParse 0.2
AUTHOR ADDR	GPO Station, PO Box 20350; Brooklyn NY 11202-0350	SVM HeaderParse 0.2
AUTHOR NAME	Gyöngyi Gaál	SVM HeaderParse 0.2
AUTHOR AFFIL	† Present address:; Neuroprosthesis Research Organization	SVM HeaderParse 0.2
AUTHOR ADDR	GPO Station, PO Box 20350; Brooklyn NY 11202-0350	SVM HeaderParse 0.2
AUTHOR NAME	Rebecka Jornsten	SVM HeaderParse 0.2
AUTHOR AFFIL	† Present address:; Neuroprosthesis Research Organization	SVM HeaderParse 0.2
AUTHOR ADDR	GPO Station, PO Box 20350; Brooklyn NY 11202-0350	SVM HeaderParse 0.2
ABSTRACT	Synchrony among multicortical EEGs 2 Freeman, Gaál & Jörnsten Information transfer and integration among functionally distinct areas of cerebral cortex of oscillatory activity requires some degree of phase synchrony of the trains of action potentials that carry the information prior to the integration. However, propagation delays are obligatory. Delays vary with the lengths and conduction velocities of the axons carrying the information, causing phase dispersion. In order to determine how synchrony is achieved despite dispersion, we recorded EEG signals from multiple electrode arrays on five cortical areas in cats and rabbits, that had been trained to discriminate visual or auditory conditioned stimuli. Analysis by time-lagged correlation, multiple correlation and PCA, showed that maximal correlation was at zero lag and averaged.7, indicating that 50 % of the power in the gamma range among the five areas was at zero lag irrespective of phase or frequency. There were no stimulus-related episodes of transiently increased phase locking among the areas, nor EEG "bursts " of transiently increased amplitude above the sustained level of synchrony. Three operations were identified to account for the sustained correlation. Cortices broadcast their outputs over divergent-convergent axonal	SVM HeaderParse 0.2
YEAR	2003	INFERENCE
VENUE	Int. J. Bifurc. Chaos	INFERENCE
VENUE TYPE	JOURNAL	INFERENCE
VOLUME	13	INFERENCE
CITATIONS	45 found	ParsCit 1.0