Lazareva N A, Shevelev I A, Sharaev G A, Novikova R V, Tikhomirov A S
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
Zh Vyssh Nerv Deiat Im I P Pavlova. 1998 May-Jun;48(3):485-95.
The role of the central and peripheral zones of the receptive field (RF) in sensitivity to cruciform figures was studied in 29 neurons of the cat primary visual cortex. Separated or combined stimulation of these zones revealed summation, reciprocity response interaction, or the absence of their interaction by the sensitivity index (ratio between response magnitudes to a cruciform figure and a bar). Stimulation of only central or only peripheral zone of the RF in nearly equal number of cases increased or decreased the sensitivity index in comparison with full cruciform figure. The neurons were found which did not change their sensitivity to cruciform figure under conditions of its partial masking. Mechanisms and functional significance of the interaction between the central and peripheral zones of RF for selection of line crossing in the striate cortex are discussed.
在猫的初级视觉皮层的29个神经元中，研究了感受野（RF）的中央区和周边区在对十字形图形的敏感性方面的作用。对这些区域进行单独或联合刺激，通过敏感性指数（对十字形图形和条形的反应幅度之比）揭示了总和、互易反应相互作用或它们之间不存在相互作用。在几乎相同数量的情况下，仅刺激RF的中央区或仅刺激周边区，与完整的十字形图形相比，敏感性指数增加或降低。发现了一些神经元，在十字形图形部分被遮挡的情况下，它们对十字形图形的敏感性没有改变。讨论了RF中央区和周边区之间相互作用的机制及其在纹状皮层中选择线交叉的功能意义。
