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Neural responses in a fast periodic visual stimulation paradigm reveal domain-general visual discrimination deficits in developmental prosopagnosia
Cortex ( IF 3.6 ) Pub Date : 2020-09-29 , DOI: 10.1016/j.cortex.2020.09.008
Katie Fisher 1 , John Towler 2 , Bruno Rossion 3 , Martin Eimer 4
Affiliation  

We investigated selective impairments of visual identity discrimination in developmental prosopagnosia (DP), using a fast periodic identity oddball stimulation paradigm with electroencephalography (EEG). In Experiment 1, neural responses to unfamiliar face identity changes were strongly attenuated for individuals with DP as compared to Control participants, to the same extent for upright and inverted faces. This reduction of face identity discrimination responses, which was confirmed in Experiment 2, provides direct evidence for deficits in the visual processing of unfamiliar facial identity in DP. Importantly, Experiment 2 demonstrated that DPs showed attenuated neural responses to identity oddballs not only with face images, but also with non-face images (cars). This result strongly suggests that rapid identity-related visual processing impairments in DP are not restricted to faces, but also affect familiar classes of non-face stimuli. Visual discrimination deficits in DP do not appear to be face-specific. To account for these findings, we propose a new account of DP as a domain-general deficit in rapid visual discrimination.



中文翻译:

快速周期性视觉刺激范式中的神经反应揭示了发育性前瞻性障碍中的一般性视觉辨别力缺陷

我们使用脑电图(EEG)的快速周期性身份奇异球刺激范例,研究了发育性更年期(DP)中视觉身份歧视的选择性损伤。在实验1中,与对照组相比,患有DP的个体对陌生的面孔身份变化的神经反应大大减弱,对于直立和倒立的面孔也是如此。实验2中已证实,这种面部身份歧视反应的减少为DP中不熟悉的面部身份的视觉处理缺陷提供了直接证据。重要的是,实验2证明DP不仅对脸部图像而且对非脸部图像(汽车)显示出对身份奇异球的减弱的神经反应。这一结果强烈表明,DP中与身份相关的快速视觉处理障碍不仅限于面部,而且还会影响熟悉的非面部刺激类别。DP中的视觉辨别力缺陷似乎不是特定于面部的。为了说明这些发现,我们提出了DP的新描述,DP是快速视觉识别中的一个领域一般缺陷。

更新日期:2020-10-30
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