A mismatch negativity study for the characteristics of the temporal window of integration

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  • 事象関連電位―新しい時代に向けて―ミスマッチ陰性電位を指標とした時間統合窓の基本特性の検討
  • ミスマッチ陰性電位を指標とした時間統合窓の基本特性の検討
  • ミスマッチ インセイ デンイ オ シヒョウ ト シタ ジカン トウゴウ マド ノ キホン トクセイ ノ ケントウ

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Abstract

Auditory information is initially retained in short auditory storage through the integration system depending on the temporal window of integration (TWI). The MMN to the inter-stimulus interval (ISI) change (22 ms) was recorded to examine whether the TWI was formed by each stimulus onset or not. The stimuli consisted of three 22 ms tone bursts with a 22 ms pause in between. Furthermore, a standard ISI was manipulated in different blocks (66, 88, 110, 132, and 198 ms). If the TWI was formed by each stimulus, the MMN should be elicited even in the condition with longer ISI. As a result, the MMN was elicited by the contraction in ISI, but not by the expansion, in all ISI conditions. These results indicate that the duration of a TWI is variable in different blocks, whereas it is fixed within the block depending on the standard ISI. It is subsequently suggested that the TWI is operated flexibly in short auditory storage.

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