ソーシャルネットワークのサイズは,マカクの神経回路に影響します.
J Sallet1, R B Mars, M P Noonan
1Department of Experimental Psychology, University of Oxford, Oxford OX1 3UD, UK. jerome.sallet@psy.ox.ac.uk
まとめ
より大きな社会集団で生活すると,特定の脳領域の灰色物質が増加し,猿の神経活動結合が強化されます. これは,ソーシャルネットワークのサイズが脳の構造と機能の両方に影響を与えることを示唆しています.
科学分野:
- 神経科学は神経科学である.
- プリマトロジー・プリマトロジー学
- ソーシャル・コグニションとは
背景:
- 以前の研究では,ソーシャルネットワークのサイズと脳構造の変動との間には相関関係があることを示唆しています.
- ソーシャルネットワークのサイズと脳構造の変化の因果関係は,まだ確立されていない.
研究 の 目的:
- ソーシャルネットワークのサイズが脳の構造と機能に因果的に影響するかどうかを調査する.
- 非人間霊長類における社会的複雑性の神経基盤を探求する.
主な方法:
- 神経イメージングは,さまざまなサイズの社会集団に収容された23匹のサルで実施されました.
- 脳構造 (グレーマター) と機能的活動結合を分析した.
- ソーシャルネットワーク内の支配的ランクも評価されました.
主要な成果:
- より大きな集団で生活すると,中上側側筋とロストラル前頭前皮質の灰色質が増加しました.
- より大きなグループでは,前頭皮質と側頭皮質の領域間の機能的活動結合の強化が観察されました.
- これらの領域における灰色物質の差異は,個々の支配的ランクと相関していた.
結論:
- ソーシャルネットワークのサイズは,脳の構造と機能を変化させる因果的な要因です.
- これらの神経の変化は,社会的成功と優位性に影響を与える可能性があります.
- この研究は,社会環境が脳に及ぼす神経生物学的な影響の証拠を提供する.
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