Ivanov R S, Bondar' I V, Saltykov K A, Shevelev I A
Zh Vyssh Nerv Deiat Im I P Pavlova. 2006 Jul-Aug;56(4):516-22.
In acute experiments with 9 anesthetized and immobilized cats, the relative tangential square of the activated cortical columns in area 17 was mapped by the intrinsic optical signal under stimulation with grids of different orientation. We examined the "oblique effect", i.e. the greater representation of neurons tuned to the vertical and horizontal orientations vs. oblique orientations in the primary visual cortex. The square of the activated parts of the cortex was estimated under different threshold criteria (80, 60 and 40% of the maximum). The "oblique effect" was not observed in our study: the areas of activation of the cortical columns did not differ statistically for two basic vs. oblique orientations. Reasons for the difference between the results of electrophysiological and optical mapping are suggested and possible contributions of the experimental protocol (anesthesia) and individual visual experience in different animals' samples to the origin of these differences are discussed.
在对9只麻醉并固定的猫进行的急性实验中，利用内在光学信号在不同方向光栅刺激下绘制了17区激活皮质柱的相对切向平方图。我们研究了“倾斜效应”，即在初级视觉皮层中，与倾斜方向相比，对垂直和水平方向调谐的神经元有更大的表征。在不同的阈值标准（最大值的80%、60%和40%）下估计皮质激活部分的平方。在我们的研究中未观察到“倾斜效应”：皮质柱的激活面积在两种基本方向与倾斜方向之间无统计学差异。文中提出了电生理映射和光学映射结果存在差异的原因，并讨论了实验方案（麻醉）以及不同动物样本中个体视觉经验对这些差异产生的可能影响。
