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ERPの初期段階では,主観的に意識しない低レベルの顔処理と高レベルの顔処理を分離する.

Maximilian Bruchmann1,2, Josephine Skutta1, Sebastian Schindler1,2

  • 1Institute of Medical Psychology and Systems Neuroscience, University of Münster, Von-Esmarch-Street 52, D-48149 Münster, Germany.

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PubMed
まとめ

無意識の顔でさえ 早期の脳反応を誘発します 低レベルの視覚処理 (P1) は,すべての刺激に対して発生し,高レベルの顔認識 (N170) は,意識的に認識されていない場合でも,顔を区別します.

キーワード:
EEG/ERP顔無意識の処理感知意識のスケールスクランブルサブリマニアル

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科学分野:

  • 認知神経科学
  • 視覚的知覚
  • 心理学

背景:

  • 認知科学では,無意識で知覚された刺激,特に顔の処理は議論の余地があります.
  • 意識と無意識の認識の 神経関連性を理解することは 脳機能のマッピングに不可欠です
  • イベント関連ポテンシャル (ERP) は,迅速な神経処理段階を調査するための時間的な解像度を提供します.

研究 の 目的:

  • 顔の神経処理と 制御刺激を 意識の変化の条件下で調べる
  • ERPを使用して,後の構成面の処理から初期の感覚処理を分離する.
  • 顔の特定の処理が 意識的知覚なしに起こるかどうかを判断する.

主な方法:

  • 40人の参加者からのイベント関連ポテンシャル (ERP) を記録するために電脳図 (EEG) を使用しました.
  • 顔が描かれ,顔が混ざり,円形が描かれ,その後にマスクが描かれます.
  • ERPの初期のコンポーネント (P1,N170) を分析し,主観的な認識評価と相関させた.

主要な成果:

  • P1コンポーネントは 顔と混ざった刺激の 類似の振幅を示し 意識に関係なく 早期の感覚処理を示しました
  • N170コンポーネントは,無意識に認識された顔に対してさえ,制御刺激から顔を区別したが,弱まった差異があった.
  • 意識のある顔も無意識の顔も 異なる神経反応を誘発し 顔の処理の初期段階を支えました

結論:

  • 発見は,顔処理の2つの異なる初期段階を示唆しています. 低レベルの感覚段階 (P1) と構成処理段階 (N170).
  • 無意識の顔に対するN170の反応は,意識外の特定のレベルの顔処理が起こることを示しています.
  • これらの結果は 顔の処理には 意識的な知覚が必要だという考えに 異議を唱えます