言語のための脳の機能的組織における性差異
B A Shaywitz1, S E Shaywitz, K R Pugh
1Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut 06510-8064.
Nature
|February 16, 1995
まとめ
脳の言語組織における性差が調査されました. 男性は,音声学的タスクの左脳横向化を示し,女性は両方の半球を関与させ,異なる神経処理を示しました.
科学分野:
- 神経科学は神経科学である.
- コグニティブ・サイエンス コグニティブ・サイエンス
- 心理学 心理学とは
背景:
- 言語のための脳の機能的組織,特に性差は,依然として議論の余地のあるテーマです.
- 主要な仮説は,言語は男性ではより横方向,女性では双方向であることが示唆されていますが,証拠は不確実です.
研究 の 目的:
- 言語処理中の脳の機能的組織における性差異を調査する.
- 男性と女性のオルトグラフィック,フォノロジック,セマンティックタスクにおける神経活性化パターンを調べる.
主な方法:
- 38人の右利き被験者 (19人の男性,19人の女性) にエコー平面機能性磁気共振画像 (fMRI) を使った.
- 被験者は,綴り (文字認識),音声 (リズム),意味 (カテゴリー) のタスクを実行しました.
主要な成果:
- 音声学的タスクの間,男性の脳活性化は,左下側前頭回に横方向化された.
- 女性参加者は異なる活性化パターンを示し,双方向の下部前頭回関節領域を巻き込みました.
- これらの発見は,音声学的処理のための神経系における性に基づく多様性を示唆しています.
結論:
- この研究は,言語のための機能的な脳組織における性差異の明確な証拠を提供します.
- これらの差異は,音声学的処理のレベルで特に顕著です.
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