Versavel M, Orban G A, Lagae L
Laboratorium voor Neuro- en Psychofysiologie, Katholieke Universiteit te Leuven, Belgium.
Vision Res. 1990;30(2):235-48. doi: 10.1016/0042-6989(90)90039-n.
Single cells were recorded in area 17 of anaesthetized and paralyzed cats and their responses to curved stimuli and chevrons compared. Striate cells exhibited three different response patterns. A first group responded optimally to a straight line (i.e. zero curvature) and responded similarly to chevrons and to curved lines. A second group responded to all curvatures and was broadly tuned for the straight line when tested with chevrons. A third group responded only to large curvatures, many (2/3) to both signs of curvature and a number (1/3) to only one sign. Cells in this group responded differently to chevrons and curved lines. Cells in these three classes differed both in length-response curve and in width of orientation tuning. Laminar analysis revealed that the three classes are distributed differently across cortical layers. These data shed new light on the finding of Malpeli and coworkers that orientation is extracted at least twice in a cortical column.
在麻醉和瘫痪的猫的17区记录单细胞，并比较它们对弯曲刺激和V形图案的反应。纹状细胞表现出三种不同的反应模式。第一组对直线（即零曲率）反应最佳，对V形图案和曲线的反应相似。第二组对所有曲率都有反应，在用V形图案测试时对直线的调谐较宽泛。第三组仅对大曲率有反应，许多细胞（2/3）对两种曲率方向都有反应，一些细胞（1/3）仅对一种曲率方向有反应。该组中的细胞对V形图案和曲线的反应不同。这三类细胞在长度 - 反应曲线和方向调谐宽度上均有所不同。层状分析表明，这三类细胞在皮质各层中的分布不同。这些数据为马尔佩利及其同事的发现提供了新的线索，即在一个皮质柱中，方向至少被提取了两次。
