| Title: | DYNAMICS OF COHERENCE IN CORTICAL NEURAL ACTIVITY: EXPERIMENTAL OBSERVATIONS AND FUNCTIONAL INTERPRETATIONS |
| DOI No: | doi:10.1142/S0129065792000437 |
| Source: | International Journal of Neural Systems, Vol. 3, Supplementary Issue 1 (1992) 105-114 |
| Copyright: | World Scientific Publishing Company |
| Author(s): | Ad Aertsen
Institut für Neuroinformatik, Ruhr-Universität Bochum, PO Box 102184, D-4630 Bochum, FRG, Germary
Eilon Vadia
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Moshe Abeles
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Ehud Ahissar
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Hagai Bergman
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Benny Karmon
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Yizhar Lavner
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Eyal Margalit
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Israel Nelken
Dept. of Physiology, Hadassah, Hebrew University, PO Box 172, Jerusalem 91010, Israel
Stefan Rotter
Max-Planck-Institut für biologische Kybernetik, Spemannstrasse, 38, D-7400 Tübingen, FRG, Germary
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| Abstract: | We
present results from an ongoing electrophysiological study of cortical
function in the awake, behaving monkey. Single and multiple neuron
activity is recorded from the frontal cortex, while the monkey is
engaged in a sensory-motor association task. Results show that
neighboring neurons in the frontal cortex may be functionally related
and share common features. However, even when neurons were reduced by
the same microelectrode, they were not all activated in unison, nor did
they all show the same functional properties. Correlation analysis
reveals that interactions between neurons may strongly depend on
stimulus context and/or behavioral state. Moreover, the interactions
may be highly dynamic, with time constants of modulation as low as tens
of milliseconds. These findings point at the need to distinguish
between anatomical connectivity and functional coupling. The underlying
mechanisms as well as the functional implications of such dynamic
coupling in cortical networks are discussed. |
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