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Magnetic field strength properties in bone marrow during pulsed electromagnetic stimulation

Journal of Biomedical Science and Engineering 2010年第12期3卷 1156-1160页

作者： Hiroyuki Tamaki Kengo Yotani Atsumu Yuki hikari kirimoto Kazuhiro Sugawara Hideaki Onishi 不详

We clarified the characteristics of pulsed electromagnetic field (PEMF) strength in marrow cavity with bone marrow in long bones based on actual measurements taken during pulsed magnetic stimulation (PMS). Measurements were made under 810 different conditions of stimulation intensity, distance, and position. Significant and strong linear correlations were observed between PEMF strength and stimulation intensity. PEMF strength in marrow cavity during PMS showed an exponential decay depending on coil-sensor distance, with a breaking point at approximately 30 mm. PEMF strength distributions in bone showed geometric differences between 3 types. These findings suggest that PEMF strength in bone depends on stimulation intensity, distance and horizontal position. Our actual measured data could be useful in determining stimulation programs and estimating the in vivo efficacy of PEMF in marrow cavity for research and clinical use.

关键词： Magnetic Stimulation Bone Tissue Focality Geometry Intensity

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World Journal of Neuroscience 2013年第3期3卷 142-146页

作者： Kengo Yotani Hiroyuki Tamaki Hiroki Nakamoto Atsumu Yuki hikari kirimoto Koji Kitada Futoshi Ogita Shiro Mori Ishikawa National College of Technology Ishikawa Japan National Center for Geriatrics and Gerontology Obu Japan National Institute of Fitness and Sports in Kanoya Kagoshima Japan Niigata University of Health and Welfare Niigata Japan

The objective of the present study was to assess the relationship of response time and peak latency of P300 with a simple-reaction task. Seven male subjects who were experienced players in decision-making sports were included. Two main findings were noted. First, the P300 latencies of Fz and Pz were correlated with visuo-motor related time. Second, in terms of latencies of visual evoked potentials, the correlations were observed only between Oz-P2 latency and visuo-motor related time. These results suggest that the length of visuo-motor related time is related to the processing involved in the higher order brain site involving specific processing in the visual cortex.

关键词： Simple-Reaction Task P300 Visual Evoked Potentials Athletes

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