Department of Psychology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Neuropsychologia. 2011 Jun;49(7):1788-93. doi: 10.1016/j.neuropsychologia.2011.03.001. Epub 2011 Mar 6.
When searching for a target presented among distractors by means of Rapid Serial Visual Presentation (RSVP), participants often report the stimulus that is preceding or following the target as being the target. These so-called temporal binding errors are accompanied by high levels of confidence so that participants are bemused with the mismatch between their perceptual experience and the actual presented stimulus. By contrast with spatial binding the neural basis for temporal binding errors remains unexplored. Previous neuropsychology studies using non-spatial selective attention tasks have shown that right temporo-parietal cortex is involved in the temporal deployment of attention. Here we investigated the neural basis of temporal binding in five patients with visual extinction whose lesions involved different cortical areas in the right hemisphere, including the temporo-parietal cortex. Patients made significantly more binding errors for contralesional than ipsilesional stimuli and more binding errors than healthy controls. Incorrect binding from distractors near to the target was the most common for both patients and controls. Eye movements did not contribute to the pattern of results. These results show that right hemisphere cortical areas contribute to the accurate temporal coding of visual features.
当通过快速序列视觉呈现 (RSVP) 在分心物中搜索目标时，参与者经常报告紧随目标或在目标之前的刺激是目标。这些所谓的时间绑定错误伴随着高度的置信度，以至于参与者对他们的感知体验与实际呈现的刺激之间的不匹配感到困惑。与空间绑定不同，时间绑定错误的神经基础仍未得到探索。以前使用非空间选择性注意任务的神经心理学研究表明，右颞顶叶皮层参与了注意力的时间分配。在这里，我们研究了 5 名视觉缺失患者的时间绑定的神经基础，他们的病变涉及右半球的不同皮层区域，包括颞顶叶皮层。患者对患侧刺激的绑定错误明显多于对健侧刺激的绑定错误，也多于健康对照组。患者和对照组最常见的错误绑定都来自于靠近目标的分心物。眼球运动并没有导致结果模式的改变。这些结果表明，右半球皮层区域有助于对视觉特征进行准确的时间编码。
