主要視野皮質における感覚マップトポグラフィーの基礎となる原理
Jens Kremkow1, Jianzhong Jin1, Yushi Wang1
1Graduate Center for Vision Research, State University of New York, College of Optometry, 33 West 42nd Street, New York, New York 10036, USA.
Nature
|April 28, 2016
まとめ
視覚皮質の地図は,空間位置の地図とリンクされています. この組織は,タラムスの光 (ON) と暗 (OFF) 信号の配置から生じ,視覚的地形学の共通の原理を明らかにします.
科学分野:
- 神経科学
- 視覚システム
- 皮質マッピング
背景:
- 主要視野皮質は 位置,眼の優位性,方向性に基づいて 視覚的なシーンを詳細に地図化しています
- オリエンテーション,方向,網膜の差の地図の起源は完全に理解されていません.
- 空間的位置と眼の優位性に関する既存の地図は,タラミックアファレント軸索の配置と関連しています.
研究 の 目的:
- 視覚的皮質マップの基礎となる組織的原理を調査する.
- 空間位置マップと他の視覚刺激次元マップの関係を決定する.
- 視覚皮質のトポグラフィにおけるタラミックアファレント組織の役割を明らかにする.
主な方法:
- 猫 (Felis catus) の視覚皮質の皮質マップの分析
- タラミックアファレント軸索の空間的配置を調べる
- オリエンテーション,方向,網膜の格差マップとのオンオフ刺激マップの相関.
主要な成果:
- オリエンテーション,方向,網膜の格差に関する皮質マップは,光 (ON) と暗 (OFF) の刺激の空間位置マップと密接に関連しています.
- ON-OFFマップは,OFFが支配する,OFF中心の,そして眼球の支配列に直角である.
- このON-OFFの組織は,ONとOFFのthalamic afferentsのクラスタリングから発生します.
結論:
- 視覚皮質のトポグラフィーには 共通の組織原理があります
- 類似の網膜構造とオン・オフの極性を持つタラミック軸索は,隣接する皮質領域に配置されています.
- この配列は 方向性や方向性や網膜の不均一性に関する地図の形成を左右します
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