Del Viva Maria Michela, Agostini Rachele
Department of Psychology, University of Florence, Florence, Italy.
Invest Ophthalmol Vis Sci. 2007 Jun;48(6):2940-6. doi: 10.1167/iovs.06-0729.
To investigate the effect of ageing on contour integration in subjects whose ages ranged from 20 to 99 years.
Detection thresholds were measured for a closed chain of Gabor patches oriented tangentially to a circle (target) embedded in a background of randomly positioned and oriented Gabors (noise). Detection thresholds were measured for different distances of elements composing the target.
Sensitivity decreases gradually with age at all interelement distances. Sensitivity decreases with increasing interelement distance, in both young and elderly subjects. The decrease of integration capability with age is not related to a decrease in contrast sensitivity.
Overall, the data provide evidence of a deterioration of cortical functionality with age, in agreement with other studies on texture and motion processing.
研究年龄在20至99岁之间的受试者衰老对轮廓整合的影响。
测量嵌入在随机定位和定向的加博尔条纹（噪声）背景中的、与圆相切定向的加博尔条纹闭合链（目标）的检测阈值。针对构成目标的元素的不同间距测量检测阈值。
在所有元素间距下，敏感性均随年龄逐渐降低。在年轻和老年受试者中，敏感性均随元素间距增加而降低。整合能力随年龄的下降与对比敏感度的降低无关。
总体而言，这些数据证明了皮质功能随年龄的衰退，这与其他关于纹理和运动处理的研究结果一致。
