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Prog. Theor. Phys. Supplement No. 173 (2008) pp. 332-341

Detection of Neural Activity Associated with Thinking in Frontal Lobe by Magnetoencephalograpy

Kazuo Nishimura,^1,* Yoshikazu Tobinaga^2,** and Mitsuo Tonoike^3,***

¹Institute of Economic Research, Kyoto University, Kyoto 606-8501, Japan
²Elegaphy, 409, Bldg#1, KRP 134, Kyoto 600-8813, Japan
³Department of Medical System Engineering, Graduate School of Engineering,
Chiba University, Chiba 263-8522, Japan

Abstract:

We measured brain activity in normal subjects using magnetoencephalography while they were presented a series of thinking tasks intended to induce the natural thought. Changes in the spontaneous brain activity were assessed with a Super-conducting Quantum Interference Device (SQUID) neuromagnetometer. We detected transitions in the active portions of the brain during non-thinking tasks by analyzing brain magnetic filed of the frontal lobe in each various frequency range, α wave (8-12Hz), β wave (12-24Hz), γ wave (24-60Hz), and θ wave (4-8Hz). The α wave in the left hemisphere was more prominent than and waves, a distinctive feature of brain activity of the non-thinking state in our study. In addition, the α wave was prominent in the left hemisphere throughout every task including the non-thinking task.

URL : http://ptp.ipap.jp/link?PTPS/173/332/
DOI : 10.1143/PTPS.173.332

^*E-mail: nishimura@kier.kyoto-u.ac.jp
^**E-mail: tobinaga@elegaphy.com
^***E-mail: tonoike@faculty.chiba-u.jp

[ Full Text PDF : FREE ACCESS (1185K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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