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Alipour A, Mojdehfarahbakhsh A, Tavakolian A, Morshedzadeh T, Asadi M, Mehdizadeh A, Nami M. Neural communication through theta-gamma cross-frequency coupling in a bistable motion perception task. J Integr Neurosci 2016; 15:539-551. [PMID: 27931147 DOI: 10.1142/s0219635216500291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Functional significance of the neural oscillations has been debated since long. In particular, oscillations have been suggested to play a major role in formation of communication channels between brain regions. It has been previously suggested that gamma coherence increases during communication between hemispheres when subjects perceive a horizontal motion in Stroboscopic Alternative Motion (SAM) stimulus. In addition, disruption of this coherence may change the horizontal perception of SAM. In this study, we investigated the changes of Cross-Frequency Coupling (CFC) in EEG signals from parietal and occipital cortices during horizontal and vertical perception of SAM. Our results suggested that while the strength of CFC in parietal electrodes showed no significant change, CFC in P3-P4 electrode-pair demonstrated a significant correlation during horizontal perception of SAM. Therefore, the CFC between theta- and gamma-band oscillations seems to be correlated with changes in functional interactions between brain regions. Accordingly, we propose that in addition to gamma coherence, CFC is perhaps another neurophysiological mechanism involved in neural communication.
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Affiliation(s)
- Abolfazl Alipour
- * Students Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.,† Neuroscience Laboratory (Brain, Cognition and Behavior), Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran.,‡ Conscioustronics Foundation, Shiraz, Iran
| | | | - Ashkan Tavakolian
- ¶ Department of Physics, Collage of Science, Shiraz University, Shiraz, Iran
| | - Taha Morshedzadeh
- * Students Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.,∥ Faculty of Arts and Science, University of Toronto, Toronto, ON, Canada
| | - Maedeh Asadi
- * Students Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Alireza Mehdizadeh
- ** Department of Medical Physics and Engineering, School of Medicine, Shiraz University of Medical Sciences Shiraz, Iran
| | - Mohammad Nami
- † Neuroscience Laboratory (Brain, Cognition and Behavior), Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran.,†† Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran.,‡‡ Shiraz Neuroscience Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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