Yaginuma S, Niihara T, Iwai E
Neuropsychologia. 1982;20(1):21-32. doi: 10.1016/0028-3932(82)90084-7.
An attempt was made to elucidate the nature and neural basis of the elevated discrimination limen for visual stimuli of reduced sizes that had been discovered earlier in monkeys with inferotemporal lesions. Although anterior inferotemporal damage was found to have only negligible effect, both total inferotemporal and posterior inferotemporal lesions yielded markedly elevated limens for reduced pattern stimuli but not for reduced colour stimuli. The impaired animals could be trained to discriminate reduced patterns that were below their original discrimination limen, but this required many more trials than were needed for postoperative relearning of the initial pair; normal animals, by contrast, showed perfect transfer from the standard to the smallest pair. The findings suggest that the increased threshold for reduced patterns in monkeys with inferotemporal lesion is attributable not to a visual acuity disorder but to an impairment of pattern perception resulting mainly from damage to posterior inferotemporal cortex.
人们试图阐明早些时候在患有颞下叶损伤的猴子身上发现的、对于尺寸减小的视觉刺激而言辨别阈升高的本质及神经基础。尽管发现颞下叶前部损伤的影响微不足道，但颞下叶整体损伤和颞下叶后部损伤都会使尺寸减小的图案刺激的辨别阈显著升高，而对于尺寸减小的颜色刺激则不然。可以训练受损动物辨别低于其原始辨别阈的减小图案，但这比术后重新学习最初的图案对所需的试验次数要多得多；相比之下，正常动物从标准图案对到最小图案对表现出完美的迁移。这些发现表明，患有颞下叶损伤的猴子对减小图案的阈值升高并非归因于视力障碍，而是主要由于颞下叶后部皮质受损导致的图案感知受损。
