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13.
海馬認知地図仮説
• “海馬に地図が保持される“:他者中心座標
• 右:アトラクタ回路により、複数のマップを記憶するモデル
O‘Keefe & Nadel (1978) The Hippocampus as a Cognitive Map, Oxford University
Press. http://www.cognitivemap.net/
Fig 4A in Samsonovich et al. 1997
http://www.jneurosci.org/content/17/15/5900.full
14.
ヘッドディレクション細胞
• 場所によらず、ラットが向いた方向に選択的に活動する細胞
• 視覚手がかりに影響
• 暗闇でも反応
http://www.scholarpedia.org/article/Head_dir
ection_cells
Taube et al. (1990)
Figure from McNaughton et al.(2006)
モデル
図:
ヘッドディレクション細胞のリング状
回路
15.
グリッド細胞
• 六角格子上の位置に選択的に
活動する細胞
• 空間の“距離”を計量的に表現
Figures from
http://www.scholarpedia.org/article/Grid_cells
Hafting et al. (2005)
Solstad et al. (2006)