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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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Article type: Appendix
2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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Teruhiko FUWA, Kotaro AKADA, Munenori NAGATA, Akihiko HANAFUSA, Tomozu ...
Article type: Article
2012 Volume 17 Issue 1 Pages
1-13
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This study was aimed at establishing a new index of respiratory regularity (IRR). By time-frequency analysis of a given respiratory curve, the IRR is defined as the frequency bandwidth of the respiratory component of power spectral density. The LIRR is also defined as the log-transformed IRR. The IRR was applied to respiratory curves of 14 subjects when the subjects breathed with controlled respiration and with natural respiration. The mean LIRR under controlled respiration was significantly lower compared with that under natural respiration. In addition, the characteristics of the IRR were examined by applying the IRR to computer-generated pseudo respiratory curves in the Appendix. In conclusion, the characteristics of the IRR were elucidated, and the IRR could quantitatively describe the subjects' respiratory regularity.
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Susumu KUDO, Yuuki SAKAGUCHI, Koichi IWANAGA, Tateki SUMII, Shuhei OKU ...
Article type: Article
2012 Volume 17 Issue 1 Pages
15-21
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The objective of this study was to investigate the effect of ambient temperature on the cold-induced vasodilation (CIVD) response of skin blood flow. For this purpose, the right middle fingers of fifteen subjects were immersed in 7℃ water for 30 min at ambient environmental temperatures of 20℃, 25℃, and 28℃. During their CIVD responses, the maximum value of blood flow at 20℃ increased more than 3-fold relative to the value before the response. At 28℃, skin temperature increased faster after exposure to cold water than it did at 20℃; however, the onset time of changes in blood flow did not differ significantly among the three temperature conditions. From these results, it is clear that in order to study the mechanism of CIVD, it is necessary to make simultaneous multimodal measurements.
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Keiko WAKISAKA, Shusa HASHIMOTO
Article type: Article
2012 Volume 17 Issue 1 Pages
23-30
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The one word task on five colors(1 word/5 colors task) and five word task on five colors(5 words/5 colors task) were created as the stimuli on the stroop task. P300 was measured in order to examine how difficulty of task influenced attention. Sixteen healthy female subjects volunteered for the experiments. When matching color and word names, this became a target stimulus requiring pressing the reaction button. The target stimulus to standard stimulus ratio was 2:8. P300 amplitude was significantly larger in 1 word/5 colors task than in 5 words/5 colors task. P300 latency was significantly shorter in 1 word/5 colors task than in 5 words/5 colors task. The results showed 1 word/5 colors task was difficult, suggesting that P300 amplitude was decreased because of loss of attention.
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Keiko WAKISAKA, Shusa HASHIMOTO
Article type: Article
2012 Volume 17 Issue 1 Pages
31-36
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We examined stimulus effect of different processing on ERP waveform and factors of individual differences in 3 male and 14 female subjects. We used a static image independent of value system and lifestyles to measure P300. As 17 subjects' ERP waveforms to a standard stimulus varied, we divided them into 2 groups. The subjects with a standard stimulus waveform similar to a target one having P300 as its peak were called Same Group and those with different waveforms were Different Group. Standard stimulus amplitude in Different Group was significantly smaller, compared with Same Group. Different Group potentially omitted attention resources distribution to a standard stimulus, and the lower attention and process of taking-in minimum stimulus alone were suggested as its factors.
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[in Japanese]
Article type: Article
2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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Titis WIJAYANTO
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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2012 Volume 17 Issue 1 Pages
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