A human intracranial study of long-range oscillatory coherence across a frontal–occipital–hippocampal brain network during visual object processing

Proceedings of the National Academy of Sciences of the United States of America - Tập 105 Số 11 - Trang 4399-4404 - 2008
Pejman Sehatpour1,2, Sophie Molholm3,2, Theodore H. Schwartz4, Jeannette R. Mahoney3, Ashesh D. Mehta5, Daniel C. Javitt3,2, Patric K. Stanton6, John J. Foxe3,2
1Cognitive Neurophysiology Laboratory, Program in Cognitive Neuroscience and Schizophrenia, Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA.
2Program in Cognitive Neuroscience, Department of Psychology, City College of the City University of New York, North Academic Complex, 138th Street and Convent Avenue, New York, NY 10031;
3*Cognitive Neurophysiology Laboratory, Program in Cognitive Neuroscience and Schizophrenia, Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg Road, Orangeburg, NY 10962;
4Department of Neurological Surgery, Weill Cornell Medical College, New York Presbyterian Hospital, 525 East 68th Street, New York, NY 10021;
5Comprehensive Epilepsy Center, Long Island Jewish Medical Center, 270-05 76th Avenue, New Hyde Park, NY 11040; and
6Departments of Cell Biology and Anatomy and Neurology, New York Medical College, Basic Sciences Building, Room 217, Valhalla, NY 10595

Tóm tắt

Visual object-recognition is thought to involve activation of a distributed network of cortical regions, nodes of which include the lateral prefrontal cortex, the so-called lateral occipital complex (LOC), and the hippocampal formation. It has been proposed that long-range oscillatory synchronization is a major mode of coordinating such a distributed network. Here, intracranial recordings were made from three humans as they performed a challenging visual object-recognition task that required them to identify barely recognizable fragmented line-drawings of common objects. Subdural electrodes were placed over the prefrontal cortex and LOC, and depth electrodes were placed within the hippocampal formation. Robust beta-band coherence was evident in all subjects during processing of recognizable fragmented images. Significantly lower coherence was evident during processing of unrecognizable scrambled versions of the same. The results indicate that transient beta-band oscillatory coupling between these three distributed cortical regions may reflect a mechanism for effective communication during visual object processing.

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Proceedings of the National Academy of Sciences of the United States of America

Tập 105 Số 11

4399-4404

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