کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6029539 1580929 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Differential connectivity within the Parahippocampal Place Area
ترجمه فارسی عنوان
اتصال دیفرانسیل در منطقه محل پاراه آیپکمپال
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی


- Connectivity and functional properties vary within the Parahippocampal Place Area.
- Occipital visual regions such as LOC are better connected to posterior PPA.
- The default mode network, including RSC, is better connected to anterior PPA.
- Abstract sculptures activate posterior PPA more strongly than anterior PPA.

The Parahippocampal Place Area (PPA) has traditionally been considered a homogeneous region of interest, but recent evidence from both human studies and animal models has suggested that PPA may be composed of functionally distinct subunits. To investigate this hypothesis, we utilize a functional connectivity measure for fMRI that can estimate connectivity differences at the voxel level. Applying this method to whole-brain data from two experiments, we provide the first direct evidence that anterior and posterior PPA exhibit distinct connectivity patterns, with anterior PPA more strongly connected to regions in the default mode network (including the parieto-medial temporal pathway) and posterior PPA more strongly connected to occipital visual regions. We show that object sensitivity in PPA also has an anterior-posterior gradient, with stronger responses to abstract objects in posterior PPA. These findings cast doubt on the traditional view of PPA as a single coherent region, and suggest that PPA is composed of one subregion specialized for the processing of low-level visual features and object shape, and a separate subregion more involved in memory and scene context.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 75, 15 July 2013, Pages 228-237
نویسندگان
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