初學飛鏢投擲者好壞成績之間的腦波功率和相干性差異

目的：比較初學者飛鏢投擲動作執行前，成績好與壞之間的腦波功率和相干性差異。方法：參與者爲20位慣用右手、初學飛鏢投擲的男性大學生，進行60支的飛鏢投擲，期間記錄其成績並收集出手前1秒之α1、α2、β1和β2頻率段腦波資料，接著分析比較每位參與者最好與最壞25%的成績所對應的腦波功率和F3-Fz（左前額－額中葉）、F4-Fz（右前額－額中葉）、T3-Fz（左顳葉－額中葉）和T4-Fz（右顳葉－額中葉）等4對電極間的腦波相干性。結果：優、劣成績之間在各個電極點的頻譜功率均無顯著差異；T3-Fz和T4-Fz在α2頻率的腦波相干性，較佳成績時也低於較差成績時。結論：就大腦電極點的頻譜分析來看，初學者動作本身的變異性可能較心理因素更容易影響動作表現；同時，生手在較佳成績的動作準備期時，負責動作計畫的額葉區與負責語文邏輯分析的左顳葉區之間溝通較少，顯示大腦能適當分配資源以利完成動作。透過本研究結果可得知，對於初學者來說，在較優秀運動表現的當下，大腦資源較有效率的運用，並且能透過腦波反映出來。

關鍵字

腦波；飛鏢投擲；腦波相干性；頻譜

並列摘要

Purpose: To examine the differences of EEG alpha-power and coherence between best and worst shots in dart throw for novice players. Methods: Twenty right-handed male participants, who aged 20.11±1.04 years old without dart-throw training experience, were recruited for this study. Each participant completed 60 dart throws, along with EEG collection in α1 (8-10Hz), α2 (10-13Hz), β1 (13-20Hz), and β2 (20-30Hz) bands during the last 1-second of the preshot period. The EEG powers and coherences corresponding to the best and worst 25% shots were compared. Results: The average powers of α1, α2, β1, β2 on sixteen electrodes during the preparatory period of best performance were not significantly different from those during the preparatory period of worst performance. Similarly, EEG coherences between the pairs of T3-Fz (left temporal-central frontal) and T4-Fz (right temporal-central frontal) were significantly lower in the condition of best performance than those in the condition of worst performance. Conclusion: According to EEG spectral analyses between good and poor performance, movement variability may have more powerful influence on novices' motor performance than mental factors. Meanwhile, little communication between frontal and left temporal areas seems helpful to the brain for enhancing the effectiveness of resource distribution. The results of persent study indicate that fewer cerebral cortical resources required for processing psychomotor task accompanies better performance for novice motor executers and this phenomenon can be reflected by EEG.

並列關鍵字

EEG ； dart throw ； coherence ； spectral power

參考文獻

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初學飛鏢投擲者好壞成績之間的腦波功率和相干性差異

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