کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10456445 921479 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using in vivo probabilistic tractography to reveal two segregated dorsal 'language-cognitive' pathways in the human brain
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی روانپزشکی بیولوژیکی
پیش نمایش صفحه اول مقاله
Using in vivo probabilistic tractography to reveal two segregated dorsal 'language-cognitive' pathways in the human brain
چکیده انگلیسی
Primate studies have recently identified the dorsal stream as constituting multiple dissociable pathways associated with a range of specialized cognitive functions. To elucidate the nature and number of dorsal pathways in the human brain, the current study utilized in vivo probabilistic tractography to map the structural connectivity associated with subdivisions of the left supramarginal gyrus (SMG). The left SMG is a prominent region within the dorsal stream, which has recently been parcellated into five structurally-distinct regions which possess a dorsal-ventral (and rostral-caudal) organisation, postulated to reflect areas of functional specialisation. The connectivity patterns reveal a dissociation of the arcuate fasciculus into at least two segregated pathways connecting frontal-parietal-temporal regions. Specifically, the connectivity of the inferior SMG, implicated as an acoustic-motor speech interface, is carried by an inner/ventro-dorsal arc of fibres, whilst the pathways of the posterior superior SMG, implicated in object use and cognitive control, forms a parallel outer/dorso-dorsal crescent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain and Language - Volume 127, Issue 2, November 2013, Pages 230-240
نویسندگان
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