BLINDSIGHT IN MONKEYS
BLINDSIGHT IN MONKEYS
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DOI：
10.1038/373247a0
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发表时间：
1995-01-19
期刊：
影响因子：
64.8
通讯作者：
STOERIG, P
中科院分区：
文献类型：
--
作者：
COWEY, A;STOERIG, P
盲视，即纹状皮质破坏患者的视觉诱发的自主反应，尽管存在明显的失明，但仍能表现出来，引起了对知觉意识及其神经基础问题感兴趣的神经科学家和哲学家的关注（1-3）。它被认为是由许多外膝状体纹状体皮质离视网膜途径介导的，其性质主要在猴中研究（4）。与盲视患者一样（4-7），初级视觉皮层受损的猴子可以学习检测、定位和区分视野缺陷内的视觉刺激（4，8 -11）。尽管患者否认看到了他们在其现象盲视野中仍然能做出反应（通过强迫选择猜测）的刺激，但我们不知道猴子是否也经历了同样的现象视觉缺失。为了确定它们是否也有盲视，或者它们是否能准确地看到它们所持有的缺陷中的刺激物，在每次试验中都呈现视觉刺激物（尽管位置不同）的任务中表现出出色的检测能力的猴子在信号检测任务中进行了测试（12），其中一半的试验是空白试验，没有视觉刺激物。他们将视野缺陷中呈现的视觉刺激归类为空白试验，像患者一样，展示盲视而不是退化的真实的视力。
BLINDSIGHT, the visually evoked voluntary responses of patients with striate cortical destruction that are demonstrated despite a phenomenal blindness, has attracted attention from neuroscientists and philosophers interested in problems of perceptual consciousness and its neuronal basis(1-3). It is assumed to be mediated by the numerous extra-geniculostriate cortical retinofugal pathways whose properties are studied primarily in monkeys(4). Like patients with blindsight(4-7), monkeys with lesions of the primary visual cortex can learn to detect, localize and distinguish between visual stimuli presented within their visual field defects(4,8-11). Although the patients deny seeing the stimuli they can nevertheless respond to (by forced-choice guessing) in their phenomenally blind fields, it is not known whether the monkeys experience the same absence of phenomenal vision. To determine whether they too have blindsight, or whether they actuary see the stimuli in their held defects, monkeys who showed excellent detection in tasks where a visual stimulus was presented on every trial, albeit at different positions, were tested in a signal-detection task(12) in which half the trials were blank trials, with no visual stimulus. They classified the visual stimuli presented in the field defect as blank trials, demonstrating, like patients, blindsight rather than degraded real vision.