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Increased BOLD Variability in the Parietal Cortex and Enhanced Parieto-Occipital Connectivity during Tactile Perception in Congenitally Blind Individuals
المؤلفون المشاركون
Leo, Andrea
Bernardi, Giulio
Handjaras, Giacomo
Bonino, Daniela
Ricciardi, Emiliano
Pietrini, Pietro
المصدر
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-8، 8ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-06-20
دولة النشر
مصر
عدد الصفحات
8
التخصصات الرئيسية
الملخص EN
Previous studies in early blind individuals posited a possible role of parieto-occipital connections in conveying nonvisual information to the visual occipital cortex.
As a consequence of blindness, parietal areas would thus become able to integrate a greater amount of multimodal information than in sighted individuals.
To verify this hypothesis, we compared fMRI-measured BOLD signal temporal variability, an index of efficiency in functional information integration, in congenitally blind and sighted individuals during tactile spatial discrimination and motion perception tasks.
In both tasks, the BOLD variability analysis revealed many cortical regions with a significantly greater variability in the blind as compared to sighted individuals, with an overlapping cluster located in the left inferior parietal/anterior intraparietal cortex.
A functional connectivity analysis using this region as seed showed stronger correlations in both tasks with occipital areas in the blind as compared to sighted individuals.
As BOLD variability reflects neural integration and processing efficiency, these cross-modal plastic changes in the parietal cortex, even if described in a limited sample, reinforce the hypothesis that this region may play an important role in processing nonvisual information in blind subjects and act as a hub in the cortico-cortical pathway from somatosensory cortex to the reorganized occipital areas.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Leo, Andrea& Bernardi, Giulio& Handjaras, Giacomo& Bonino, Daniela& Ricciardi, Emiliano& Pietrini, Pietro. 2012. Increased BOLD Variability in the Parietal Cortex and Enhanced Parieto-Occipital Connectivity during Tactile Perception in Congenitally Blind Individuals. Neural Plasticity،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-1002451
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Leo, Andrea…[et al.]. Increased BOLD Variability in the Parietal Cortex and Enhanced Parieto-Occipital Connectivity during Tactile Perception in Congenitally Blind Individuals. Neural Plasticity No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-1002451
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Leo, Andrea& Bernardi, Giulio& Handjaras, Giacomo& Bonino, Daniela& Ricciardi, Emiliano& Pietrini, Pietro. Increased BOLD Variability in the Parietal Cortex and Enhanced Parieto-Occipital Connectivity during Tactile Perception in Congenitally Blind Individuals. Neural Plasticity. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-1002451
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1002451
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
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