کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7312221 | 1475434 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hemifield coding in ventral object-sensitive areas - Evidence from visual hemiagnosia
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
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چکیده انگلیسی
Electrophysiological monkey and human neuroimaging studies have reported a lateralization of signal processing in object perception. However, it is unclear whether these results point to a unique topographically organized signal processing in either hemisphere, or if these results represent a rather negligible spatial organization of otherwise redundant object perception systems in both hemispheres. We tested a group of 10 patients with lesions to ventral object processing regions and spared primary visual functions with lateral presentations of different categories of object stimuli. Object perception in the contralesional visual field was impaired while object perception on the ipsilesional hemifield was intact. These results demonstrate that the object perception system needs two intact ventral pathways for unimpaired object perception across the whole visual field; the loss of one system cannot be fully compensated by its contralateral homolog or spared parts of the lesioned ventral stream.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cortex - Volume 98, January 2018, Pages 149-162
Journal: Cortex - Volume 98, January 2018, Pages 149-162
نویسندگان
Johannes Rennig, Hans-Otto Karnath, Sonja Cornelsen, Helmut Wilhelm, Marc Himmelbach,