執行射擊動作與放棄扣板機時額葉腦波之差異

Comparison of Frontal Lobe EEG between Executed and Rejected Pistol Shots

劉倩(Chien Liu) ； 林韋儒(Wei-Ju Lin) ； 黃崇儒(Chung-Ju Huang) ； 洪聰敏(Tsung-Min Hung)

《臺灣運動心理學報》 18期 (2011/05) Pp. 55-64

https://doi.org/10.6497/BSEPT.20110501_(18).0004

摘要

本研究使用腦波觀察射擊選手在扣板機前大腦額葉皮質的變化，過去研究焦點在於專家與生手、個人內成績好與壞之間的比較，鮮少探討執行與放棄執行動作之間的差異。目的：探討專家射擊選手在執行射擊與放棄執行射擊時的額葉腦波差異。方法：參與者為有經驗的空氣槍選手24位，每位共射擊30發，其中有6位出手前放棄射擊的次數達6次以上而被本研究列為資料分析對象。射擊表現（執行、放棄）前3秒的腦波資料以每段1秒的時間切為3段，比較在執行射擊和放棄射擊時在5個額葉電極位置(F7, F3, Fz, F4, F8)的θ波(4-7Hz)之差異。結果：在射擊表現前3秒時，執行射擊時的右前額區(F4)θ波顯著高於放棄射擊時。結論：有經驗的射擊選手在執行動作時右額葉有較多的θ波，推測其對於目標距離和動作執行較為熟練，射擊時投注較多的注意力在視覺空間協調。

關鍵字

執行功能 ； 專注 ； 精確性運動

並列摘要

Since past research has examined the differences between expert and novice shooters, and intrapersonal best and worst performance, few studies have focused on the differences between executed and rejected trials that may shed light on the mental associated with optimal performance. Purpose: To examine the differences in frontal EEG between executed and rejected shots during the preparatory period. Method: Twenty-four expert pistol shooters were recruited as participants. Data of six shooters, whose rejection trials had reached the criteria of over 6 out of 30 shots, were further analyzed. EEG from the frontal region (F7, F3, Fz, F4, and F8) was assessed, and theta (4-7 Hz) frequency bands were derived between the executed and rejected shots. EEG data were segmented into three one-second epochs prior to execution or rejection. Several 2 x 3 x 5 (trial type x epoch x electrode) ANOVAs with repeated measures were employed on each frequency bands separately. Results: Compared with the rejected shots, the executed shots revealed larger theta power in the right frontal area 3 seconds prior to triggering. Conclusion: In executed shots, higher theta power in the right frontal area infers that the proficiency in distance estimate and aiming movement for the experienced shooters. They invest more attentional effort to visual-spatial coordination while executing a shot.

並列關鍵字

executive function ； concentration ； precision sports

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