Laursen A M
Behav Brain Res. 1982 Nov;6(3):201-12. doi: 10.1016/0166-4328(82)90023-7.
Monkeys with bilateral lesions in the inferotemporal cortex learn and relearn visual discrimination problems slowly, but previous studies have not settled the question of whether they, in addition, have a lasting deficit. I have trained monkeys to discriminate a circle from ellipses on a titration schedule and they produced the same thresholds as previously found in young humans. After incomplete inferotemporal lesions the monkeys were retrained in 10,000 trials during one year. Thresholds were impaired in 3 of 5 monkeys with no tendency to improvement during the last 6 months. Neither the transient nor the lasting deficit occurred after control lesions in the superior temporal gyrus. The small lasting deficit was not owing to geniculo-striate damage; in addition to histological evidence only striate lesions increased choice reaction times. The small lasting deficit is compatible with the hypothesis, that the visual system contains a hierarchy of sequential feature detectors.
双侧颞下皮质受损的猴子学习和重新学习视觉辨别问题的速度很慢，但之前的研究尚未解决它们是否还存在持久缺陷的问题。我训练猴子在滴定程序中从椭圆中辨别出圆形，它们产生的阈值与之前在年轻人类中发现的相同。在颞下皮质不完全损伤后，这些猴子在一年中的10000次试验中接受了重新训练。5只猴子中有3只的阈值受损，在最后6个月没有改善的趋势。在颞上回进行对照损伤后，既没有出现短暂性缺陷，也没有出现持久性缺陷。这种小的持久性缺陷并非由于膝状体-纹状体损伤；除了组织学证据外，只有纹状损伤会增加选择反应时间。这种小的持久性缺陷与视觉系统包含一系列顺序特征检测器的假设相符。
