Sensitive periods for the functional specialization of the neural system for human face processing

R?der B.; Ley P.; Shenoy B.H.Kekunnaya R.Bottari D.

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Sensitive periods for the functional specialization of the neural system for human face processing

机译：Sensitive periods for the functional specialization of the neural system for human face processing

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The aim of the study was to identify possible sensitive phases in the development of the processing system for human faces. We tested the neural processing of faces in 11 humans who had been blind from birth and had undergone cataract surgery between 2 mo and 14 y of age. Pictures of faces and houses, scrambled versions of these pictures, and pictures of butterflies were presented while event-related potentials were recorded. Participants had to respond to the pictures of butterflies (targets) only. All participants, even those who had been blind from birth for several years, were able to categorize the pictures and to detect the targets. In healthy controls and in a group of visually impaired individuals with a history of developmental or incomplete congenital cataracts, the well-known enhancement of the N170 (negative peak around 170 ms) event-related potential to faces emerged, but a face-sensitive response was not observed in humans with a history of congenital dense cataracts. By contrast, this group showed a similar N170 response to all visual stimuli, which was indistinguishable from the N170 response to faces in the controls. The face-sensitive N170 response has been associated with the structural encoding of faces. Therefore, these data provide evidence for the hypothesis that the functional differentiation of category-specific neural representations in humans, presumably involving the elaboration of inhibitory circuits, is dependent on experience and linked to a sensitive period. Such functional specialization of neural systems seems necessary to archive high processing proficiency.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2013年第42期|16760-16765|共6页
作者
R?der B.; Ley P.; Shenoy B.H.Kekunnaya R.Bottari D.;
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作者单位

Division of Biological Psychology and Neuropsychology, University of Hamburg, 20146 Hamburg, Germany;

Jasti v Ramanamma Children's Eye Care Center, L v Prasad Eye Institute, Hyderabad 50034, India;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Sensitive; periods; functional;

Sensitive periods for the functional specialization of the neural system for human face processing

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