Journal article
Temporal dynamics of attention-modulated neuronal synchronization in macaque V4
Neurocomputing (Amsterdam), v 52, pp 481-487
2003
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
It was recently observed that neurons in area V4 exhibited enhanced gamma band (35–
90
Hz
) synchronization when monkeys attended to a visual stimulus as compared to when they were not attending to the same stimulus (Science 291 (2001) 1560). Spike-triggered averaging of local field potentials (LFPs) was used to show attentional modulation in an early period from 50 to
150
ms
after stimulus onset (Science 291 (2001) 1560). In this work we further studied the fine temporal structure in the same data by focusing only on the LFPs without reference to the concurrent spike trains. With the method of adaptive multivariate autoregressive (AMVAR) modeling, we discovered that attentional modulation of gamma power
(∼65
Hz)
in V4 can be as brief as about
25
ms
. Gamma coherence between two V4 recording sites revealed similar attention effects, as well as a second peak around
45
Hz
. Directional influences between two V4 populations revealed that one can play a more dominant role than another. These results implicate gamma oscillation as a possible agent in carrying out attention-biased competition among visual stimuli in favor of those that are behaviorally relevant. The AMVAR method was instrumental in revealing the dynamics of gamma frequency synchronization with high temporal and frequency resolution.
Metrics
Details
- Title
- Temporal dynamics of attention-modulated neuronal synchronization in macaque V4
- Creators
- Hualou Liang - School of Health Information Sciences, University of Texas Health Science Center at Houston, Houston, TX, 77030, USASteven L Bressler - Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL 33431, USAMingzhou Ding - Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL 33431, USARobert Desimone - Laboratory of Neuropsychology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USAPascal Fries - F.C. Donders Centre for Cognitive Neuroimaging, University of Nijmegen, 6525 EK Nijmegen, The Netherlands
- Publication Details
- Neurocomputing (Amsterdam), v 52, pp 481-487
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000183514300071
- Scopus ID
- 2-s2.0-0038795577
- Other Identifier
- 991014878604104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Computer Science, Artificial Intelligence