Cerebral Cortex, Vol. 12, No. 4, 339-348,
April 2002
© 2002 Oxford University Press
FEATURE ARTICLE |
Large-scale Neural Model for Visual Attention: Integration of Experimental Single-cell and fMRI Data
1 Siemens AG, Corporate Technology, Information and Communications, CT IC 4, Otto-Hahn-Ring 6, 81739 Munich, Germany
Silvia Corchs, Siemens AG, CT IC 4, Otto-Hahn-Ring 6, 81739 Munich, Germany.
A computational neuroscience framework is proposed to better understand the role and the neuronal correlate of spatial attention modulation in visual perception. The model consists of several interconnected modules that can be related to the different areas of the dorsal and ventral paths of the visual cortex. Competitive neural interactions are implemented at both microscopic and interareal levels, according to the biased competition hypothesis. This hypothesis has been experimentally confirmed in studies in humans using functional magnetic resonance imaging (fMRI) techniques and also in single-cell recording studies in monkeys. Within this neuro-dynamical approach, numerical simulations are carried out that describe both the fMRI and the electrophysiological data. The proposed model draws together data of different spatial and temporal resolution, as are the above-mentioned imaging and single-cell results.
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