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

Kim, J.E.; Gohel, Bakul; Kim, K.; Kwon, H.; An, Kyung-min

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자료유형: 학술저널

저자정보: 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])

저널정보: 한국초전도저온학회 한국초전도·저온공학회논문지 한국초전도·저온공학회논문지 제17권 제4호

발행연도: 2015.1

수록면: 34 - 37 (4page)

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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.

#SQUID #Magnetoencephalography #Human alpha band rhythm #Inhibition

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