剣道競技者の脳内情報処理過程に関する研究：剣道を模したS1-S2選択反応課題時のP300に着目して

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  • Research on the information processing mechanisms of kendo competitors: A focus on the P300 of the S1-S2 selection reaction task stimulating kendo
  • ケンドウ キョウギシャ ノ ノウナイ ジョウホウ ショリ カテイ ニ カンスル ケンキュウ : ケンドウ オ モシタ S1-S2 センタク ハンノウ カダイジ ノ P300 ニ チャクモク シテ

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Recently, there have been many research reports related to information processing by kendo competitors. However, none of these papers demonstrate a neurophysiological analysis. Therefore, in this research we will pay attention to the target group’s brain waves (event-related potential), and we will aim for a neurophysiological analysis of the characteristics of the kendo competitors’ intracerebral information processing mechanism.<BR>The subjects were ten male college kendo competitors (kendo group, n=10) and ten male college students majoring in fields not related to physical education (general group, n=10). Two visual stimuli conditions (CT condition and Task1 condition) were created to simulate kendo in a S1-S2 selection reaction task. The event-related potential caused by the task was recorded, and the characteristics of each group’s P300 were compared and examined. Furthermore, an electromyogram was derived from the button press task, and from that the Electromyogram Reaction Time (EMG-RT) was calculated, the results of which follow.<BR>1.For both the CT and Task1 conditions, the kendo competitor group’s EMG-RT was significantly shorter than that in the general student group.<BR>2.Regarding the Task1 condition of the kendo competitor group, the NoGoP300 demonstrated a significantly higher amplitude from the frontal lobe to the parietal lobe, and a significantly shorter latency than the general group.<BR>Regarding the shortening of the kendo competitor group’s EMG-RT, it is presumed that long term continuous exercise affected the mobilization of the loop between the cerebrum and cerebellum, changes in synapse efficiency, and increased the level of cerebral cortex excitability, as well as the various parts within the brain related to exercise and information processing cooperating with each other to work efficiently. The result shown from kendo competitor group’s Task1 condition in the NoGoP300 can be thought to be related to changes in postsynaptic potential because of long-term continuous exercise, and changes in the mechanism of intracerebral information processing because of the special characteristics of kendo.<BR>The results suggest that as the kendo competitor group’s reaction time is shorter, the intracerebral information processing mechanism, especially influenced by reaction inhibition, is carried out efficiently.

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