title: Neural communication through theta-gamma cross-frequency coupling in a bistable motion perception task.
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.
authors.affiliation: * 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.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Alipour
authors.affiliation: § Department of Physiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.
authors.forename: Azadeh
authors.initials: A
authors.lastname: Mojdehfarahbakhsh
authors.affiliation: ¶ Department of Physics, Collage of Science, Shiraz University, Shiraz, Iran.
authors.forename: Ashkan
authors.initials: A
authors.lastname: Tavakolian
authors.affiliation: * Students Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.|∥ Faculty of Arts and Science, University of Toronto, Toronto, ON, Canada.
authors.forename: Taha
authors.initials: T
authors.lastname: Morshedzadeh
authors.affiliation: * Students Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Maedeh
authors.initials: M
authors.lastname: Asadi
authors.affiliation: ** Department of Medical Physics and Engineering, School of Medicine, Shiraz University of Medical Sciences Shiraz, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Mehdizadeh
authors.affiliation: † 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.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Nami
mesh_terms: D004569:Electroencephalography; D005260:Female; D065818:Gamma Rhythm / Q000502:physiology*; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009483:Neuropsychological Tests; D009778:Occipital Lobe / Q000502:physiology*; D010296:Parietal Lobe / Q000502:physiology*; D010775:Photic Stimulation; D013826:Theta Rhythm / Q000502:physiology*; D055815:Young Adult
keywords: Theta-gamma cross-frequency coupling; binding; neural communication; perception; stroboscopic alternative motion