Kayser Christoph, König Peter
Institute of Neuroinformatics, University & ETH Zürich, Winterthurerstrasse, Zürich, Switzerland.
Neuroreport. 2006 May 29;17(8):809-12. doi: 10.1097/01.wnr.0000221842.50749.95.
We compared the feature tuning of neuronal activity in area 21a with the tuning in areas 17/18. Local field potentials and multi-unit activity recorded in alert animals showed similar selectivity to orientation in both areas, higher selectivity to spatial frequencies in areas 17/18 and higher selectivity and tuning significance to temporal frequencies in areas 17/18. In addition, only at sites in areas 17/18 did the local field potential exhibit locking to a horizontal motion pattern extracted from a natural movie. These results suggest that area 21a is concerned with the analysis of spatial features but lacks a faithful representation of temporal features. Hence, they foster the hypothesis that cortical area 21a is part of a ventral form pathway.
我们将21a区神经元活动的特征调谐与17/18区的调谐进行了比较。在警觉动物中记录的局部场电位和多单元活动在两个区域对方向显示出相似的选择性，在17/18区对空间频率具有更高的选择性，在17/18区对时间频率具有更高的选择性和调谐显著性。此外，仅在17/18区的位点，局部场电位才表现出与从自然电影中提取的水平运动模式的锁定。这些结果表明，21a区与空间特征分析有关，但缺乏对时间特征的忠实表征。因此，它们支持了皮质21a区是腹侧形式通路一部分的假说。
