Verderevskaia N N, Shevelev I A
Zh Vyssh Nerv Deiat Im I P Pavlova. 1979 Sep-Oct;29(5):1001-8.
The activity of 118 neurones of the primary visual cortex (17th field) was studied in unanesthetized cats, immobilized with d-tubocurarine, in a state of calm wakefulness and in strained attention, alarm. The strained attention was elicited by an air-puff directed to the corner of the closed eye, not used for the photic stimulation. Considerable rearrangments of the receptive field of neurones (94%) were observed in the state of strained attention. In the majority of the studied cortical cells (75%) during 10-30 minutes the excitatory centres of their receptive fields became narrower while their inhibitory periphery widened; in the cells with the inhibitory centres of the receptive fields they were larger in 80% of the cases. It is shown that with dark, mesopic and scotopic adaptation the major characteristics of the changes in the receptive fields remain unaltered. It is assumed that these effects have a behavioural value for the organism, because the created rise in the level of alertness is accompanied by a sharpening of the receptive fields, i.e. by a greater ability to a fine analysis and recognition of visual images.
在未麻醉、用d -筒箭毒碱固定的猫中，研究了初级视皮层（第17区）118个神经元在平静觉醒状态、紧张注意力状态和警觉状态下的活动。紧张注意力是由吹向未用于光刺激的闭眼眼角的气流引起的。在紧张注意力状态下，观察到神经元感受野有相当大的重新排列（94%）。在大多数被研究的皮层细胞（75%）中，在10 - 30分钟内，其感受野的兴奋中心变窄，而抑制外周变宽；在感受野有抑制中心的细胞中，80%的情况是抑制中心变大。结果表明，在暗适应、中间视觉适应和暗视觉适应下，感受野变化的主要特征保持不变。据推测，这些效应对于机体具有行为学价值，因为所产生的警觉性水平的提高伴随着感受野的锐化，即对视觉图像进行精细分析和识别的能力增强。
