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首页> 外文期刊>The European Journal of Neuroscience >Generalized deficits in visual selective attention after V4 and TEO lesions in macaques.
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Generalized deficits in visual selective attention after V4 and TEO lesions in macaques.

机译：猕猴V4和TEO病变后视觉选择性注意的普遍缺陷。

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To test the role of areas V4 and TEO in the attentional filtering of distracting information, we studied the effects of lesions in these areas, in monkeys discriminating target stimuli surrounded by irrelevant distracters. The lesions were restricted, such that a single visual field quadrant was affected by a V4 lesion alone, a TEO lesion alone, or a combined lesion in V4 and TEO, while one quadrant served as a normal control. The monkeys fixated a spot while discriminating the orientation, colour or motion of target stimuli presented extrafoveally in each quadrant. When the target was presented alone, discrimination deficits in the quadrants affected by the lesions were generally small. However, these deficits were substantially increased by surrounding the target with luminance, colour or motion distracters. The discrimination of target orientation was more impaired than the discrimination of target colour or motion, irrespective of distracter type. The discrimination of target motion was strongly affected only by motion distracters. The magnitude of the impairments increased with distracter strength and with the extent to which the distracters conveyed information conflicting with the target. Deficits in the quadrant affected by combined V4 and TEO lesions were twice as large as those in quadrants affected by V4 or TEO lesions alone. The results suggest that in the absence of V4 and TEO, information from both relevant and irrelevant stimuli is 'averaged' together across several different feature domains, impairing the discrimination of the relevant target features. The results suggest a broad role of V4 and TEO in visual selective attention.
机译：为了测试区域V4和TEO在注意力分散信息的过滤中的作用，我们研究了这些区域中病变的影响，这些猴子在辨别目标干扰物的过程中被无关紧要的干扰物包围。病变受到限制，以致单个视野象限受到单独的V4病变，单独的TEO病变或V4和TEO的合并病变的影响，而一个象限则作为正常对照。猴子固定了一个斑点，同时区分了每个象限中心外出现的目标刺激的方向，颜色或运动。当单独提出目标时，受病变影响的象限中的辨别缺陷通常很小。然而，通过用亮度，颜色或运动干扰物包围目标，这些缺陷大大增加了。不管干扰物的类型如何，对目标方向的识别比对目标颜色或运动的识别受到的损害更大。目标运动的区分仅受运动分散器的强烈影响。障碍的程度随着干扰者的力量以及干扰者传达的信息与目标冲突的程度而增加。受V4和TEO合并病变的象限的缺陷是仅受V4或TEO病变影响的象限的两倍。结果表明，在没有V4和TEO的情况下，来自相关和不相关刺激的信息会在几个不同的特征域中“平均”在一起，从而削弱了对相关目标特征的区分。结果表明V4和TEO在视觉选择性注意中具有广泛的作用。

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