Dominant Patterns of Information Flow in the Propagation of the Neuromagnetic Somatosensory Steady-State Response.

摘要: Methods of functional connectivity are applied ubiquitously in studies involving non-invasive whole-brain signals, but may be not optimal for exploring the propagation steady-state responses, which strong oscillatory patterns neurodynamics evoked by periodic stimulation. In our study, we explore a network underlying somatosensory response using methods effective connectivity. Human magnetoencephalographic (MEG) data were collected 10 young healthy adults during 23-Hz vibro-tactile stimulation right hand index finger. The dynamics MEG source activity was reconstructed with linearly-constrained minimum variance beamformer. We information-theoretic tools to quantify asymmetries information flows between primary area SI and rest brain. Our analysis identified pattern coupling, leading from secondary somato-sensory SII, thalamus, motor cortex all contralateral stimuli as well cerebellum ipsilateral stimuli. results support previously reported empirical evidence both vitro vivo, indicating critical areas activation system at level systems neuroscience.