Study on Brain Activity during Memory Retention Phase of Sternberg Short Memory Task

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  • スタンバーグ短期記憶課題遂行中の記憶検索期間における脳活動の基礎的研究
  • スタンバーグ タンキ キオク カダイ スイコウ チュウ ノ キオク ケンサク キカン ニ オケル ノウ カツドウ ノ キソテキ ケンキュウ

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Present study investigated event-related potential (ERP) during the memory retention phase of Sternberg memory scanning task. We compared ERPs of 2 conditions differ in memory load (Memory3 and 5), and 2 conditions differ in memory set size(Control3 and 5). Our result indicated that different memory load was reflected in late P300 component, P3b but not in P3a. Duration of the P3b was suggested to be increased with memory load. In contrast to the previous argument that ERP components to be memory load independent, we suggest analysis limited to the late P300 component and its duration to reveal the memory load related activity in ERP.

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