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Measurement of the occipital alpha rhythm and temporal tau rhythm by using magnetoencephalography

  • Kim, J.E. (Center for Biosignals, Korea Research Institute of Standards and Science(KRISS)) ;
  • Gohel, Bakul (Center for Biosignals, Korea Research Institute of Standards and Science(KRISS)) ;
  • Kim, K. (Center for Biosignals, Korea Research Institute of Standards and Science(KRISS)) ;
  • Kwon, H. (Center for Biosignals, Korea Research Institute of Standards and Science(KRISS)) ;
  • An, Kyung-min (Center for Biosignals, Korea Research Institute of Standards and Science(KRISS))
  • Received : 2015.11.16
  • Accepted : 2015.12.18
  • Published : 2015.12.31

Abstract

Developing Magnetoencephalography (MEG) based on Superconducting Quantum Interference Device (SQUID) facilitates to observe the human brain functions in non-invasively and high temporal and high spatial resolution. By using this MEG, we studied alpha rhythm (8-13 Hz) that is one of the most predominant spontaneous rhythm in human brain. The 8-13 Hz rhythm is observed in several sensory region in the brain. In visual related region of occipital, we call to alpha rhythm, and auditory related region of temporal call to tau rhythm, sensorimotor related region of parietal call to mu rhythm. These rhythms are decreased in task related region and increased in task irrelevant regions. This means that these rhythms play a pivotal role of inhibition in task irrelevant region. It may be helpful to attention to the task. In several literature about the alpha-band inhibition in multi-sensory modality experiment, they observed this effect in the occipital and somatosensory region. In this study, we hypothesized that we can also observe the alpha-band inhibition in the auditory cortex, mediated by the tau rhythm. Before that, we first investigated the existence of the alpha and tau rhythm in occipital and temporal region, respectively. To see these rhythms, we applied the visual and auditory stimulation, in turns, suppressed in task relevant regions, respectively.

Keywords

References

  1. M. Hamalainen, R. Hari, R. J. Ilmoniemi, J. Knuutila, and O. V. Lounasmaa, "Magnetoencephalography-theory, instrumentation, and applications to noninvasive studies of the working human brain," Rev. Mod. Phys., vol. 65, pp. 413-497, 1993. https://doi.org/10.1103/RevModPhys.65.413
  2. Y. H. Lee, H. C. Kwon, J. M. Kim, Y. K. Park, and J. C. Park, "Double relaxation oscillation SQUID with reference junction for biomagnetic multichannel applications," IEEE Transactions on Applied Superconductivity, vol. 5, pp. 413-418, 1997. https://doi.org/10.1016/S0964-1807(98)00063-5
  3. E. D. Adrian and B.H.C. Matthews, "The Berger rhythm: potential changes from the occipital lobes in man," Brain, vol. 57, pp. 355-385, 1934. https://doi.org/10.1093/brain/57.4.355
  4. W. Klimesch, "Alpha-band oscillations, attention, and controlled access to stored information," Trends in cognitive sciences, vol. 16, pp. 606-617, 2012. https://doi.org/10.1016/j.tics.2012.10.007
  5. A. Mazaheri, M. R. V. Schouwenburg, A. Dimitrijevic, D. Denys, R. Colls, O. Jensen. "Region-specific modulations in oscillatory alpha activity serve to facilitate processing in the visual and auditory modalities," NeuroImage, vol. 87, pp. 356-362, 2014. https://doi.org/10.1016/j.neuroimage.2013.10.052
  6. J. J. Foxe, A. C. Snyder, "The role of alpha-band brain oscillations as a sensory suppression mechanism during selective attention," Frontiers in Psychology, 2011.
  7. R. Salmelin and R. Hari, "Spatiotemporal characteristics of sensori-motor MEG thythms related to thub movement," Neuroscience, vol. 60, pp. 537-550, 1994. https://doi.org/10.1016/0306-4522(94)90263-1
  8. L. Lehtela, R. Salmelin, R. Hari, "Evidence for reactive magnetic 10-Hz rhythm in the human auditory cortex", Neuroscience letters, vol. 222, pp. 111-114, 1997. https://doi.org/10.1016/S0304-3940(97)13361-4
  9. J. Tiihonen, R. Hari, M. Kajola, J. Karhu, S. Ahlfors, S. Tissari, "Magnetoencephalographic 10-Hz rhythm from the human auditory cortex," Neuroscience Letters, vol. 129, pp. 303-305, 1991. https://doi.org/10.1016/0304-3940(91)90486-D
  10. Y. H. Lee, K. K. Yu, H. Kwon, J. M. Kim, K. Kim, Y. K. Park, H. C. Yang, K. L. Chen, S. Y. Yang and H. E. Horng, "A whole-head magnetoencephalography system with compact axial gradiometer structure", Supercond. Sci. Technol., vol. 22, pp. 1-6, 2009.
  11. G. Thut, C. Miniussi, "New insights into rhythmic brain activity from TMS--EEG studies," Trends in cognitive sciences, vol.13, pp. 182-189, 2009. https://doi.org/10.1016/j.tics.2009.01.004