title: Modular Patterns of Phase Desynchronization Networks During a Simple Visuomotor Task.
abstract: By performing sensor-level analysis on magnetoencephalography (MEG) data we identified the dynamic evolution of the functional connectivity networks during a simple visuomotor task. The functional connectivity networks were constructed using the concept of phase-locking value (PLV). We illustrate that the task-related activity is mediated by distinct complex networks related to the PLV desynchronization that configure their architecture dynamically during the task. These networks are prominent at β and α band, and are characterized by coherent modular organization. Moreover the time for the development of the desynchronization networks at α band predicts the intra-subject variability of reaction time. Thus, the spatio-temporal dynamics and the structural properties of the emerged functional networks share common characteristics with the mechanism of coactivation and resting state networks.
authors.affiliation: School of Applied Mathematics and Physical Sciences, National Technical University of Athens, 9 Heroon Polytechniou str., 15780, Athens, Greece.|Laboratory of Sensorimotor Control, University Mental Health Research Institute, 2 Soranou Efesiou str., 11527, Athens, Greece.
authors.forename: D S
authors.initials: DS
authors.lastname: Mylonas
authors.affiliation: School of Applied Mathematics and Physical Sciences, National Technical University of Athens, 9 Heroon Polytechniou str., 15780, Athens, Greece. ksiet@mail.ntua.gr.
authors.forename: C I
authors.initials: CI
authors.lastname: Siettos
authors.affiliation: Neurology Department, Aeginition Hospital, Medical School, National and Kapodistrian University of Athens, 72 V. Sofias Ave., 11528, Athens, Greece.
authors.forename: I
authors.initials: I
authors.lastname: Evdokimidis
authors.affiliation: Division of Clinical Neurosciences, Department of Pediatrics, University of Tennessee and Neuroscience Institute, Le Bonheur Hospital, 777 Washington Ave., Memphis, TN, 38105, USA.
authors.forename: A C
authors.initials: AC
authors.lastname: Papanicolaou
authors.affiliation: Laboratory of Sensorimotor Control, University Mental Health Research Institute, 2 Soranou Efesiou str., 11527, Athens, Greece.|Psychiatry Department, Aeginition Hospital, Medical School, National and Kapodistrian University of Athens, 72 V. Sofias Ave., 11528, Athens, Greece.
authors.forename: N
authors.initials: N
authors.lastname: Smyrnis
mesh_terms: D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D006801:Humans; D015225:Magnetoencephalography; D009043:Motor Activity / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D012044:Regression Analysis
keywords: Empirical mode decomposition; Functional brain connectivity networks; MEG; Phase scattering; Phase-locking value; Task-negative networks; Visuomotor response