Study on Effects of electromagnetic Field to Biological Clock
| Project/Area Number |
15500320
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biomedical engineering/Biological material science
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| Research Institution | Hiroshima City University |
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Principal Investigator |
HIWAKI Osamu Hiroshima City University, Faculty of Information Sciences, Professor, 情報科学部, 教授 (30264948)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Electromagnetic field / Pulsed magnetic field / Biological clock / パルス磁気 / 行動リズム / 視交叉上核 |
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| Research Abstract |
We have investigated effects of electromagnetic fields to biological clock. The effects of pulsed magnetic field to the function of cerebral cortex were focused. The response of cerebral cortex to the pulsed magnetic fields was analyzed by using the model of properties of excitation of nerve fiber. The properties of pyramidal neurons which are the input and output neurons in the cortex were examined. On the basis of the fact that pyramidal cells are aligned perpendicular to the cortical surface, it seems reasonable to suppose that the site on a cortex with a great component of the induced electric field perpendicular to the cortical surface is the stimulating site where nerve excitation readily occurs by pulsed magnetic fields. We verified this notion by the experiments on the stimulation of primary motor cortex with pulsed magnetic fields. The electromyography evoked by the stimulation of the cortex with pulsed magnetic fields was measured. The results show that the component of the induced electric field perpendicular to the cortical surface is principal factor of effects to the function of cerebral cortex. We are going to carry out further studies of the effects of electromagnetic fields on the biological clock system based on the results obtained in this study.
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Report
(4 results)
Research Products
(12 results)
