کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6029093 1580923 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long term cortical plasticity in visual retinotopic areas in humans with silent retinal ganglion cell loss
ترجمه فارسی عنوان
پلاستیک کرتهای طولانی مدت در مناطق رتینیتوپاتی بصری در انسان با از دست رفتن سلولهای گانگلیونی خالص شبکیه
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی


- Unexpected increase in visual cortical thickness in early silent ganglion cell loss
- Retinotopically defined area V2 shows evidence for early compensatory plasticity.
- Later in life plasticity migrates further to extrastriate area V3.

Visual cortical plasticity induced by overt retinal lesions (scotomas) has remained a controversial phenomenon. Here we studied cortical plasticity in a silent model of retinal ganglion cell loss, documented by in vivo optical biopsy using coherence tomography. The cortical impact of non-scotomatous subtle retinal ganglion cell functional and structural loss was investigated in carriers of the mitochondrial DNA 11778G > A mutation causing Leber's hereditary optic neuropathy. We used magnetic resonance imaging (MRI) to measure cortical thickness and fMRI to define retinotopic cortical visual areas V1, V2 and V3 in silent carriers and matched control groups.Repeated Measures analysis of variance revealed a surprising increase in cortical thickness in the younger carrier group (below 21 years of age). This effect dominated in extrastriate cortex, and notably V2. This form of structural plasticity suggests enhanced plastic developmental mechanisms in extrastriate retinotopic regions close to V1 and not receiving direct retinocortical input.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 81, 1 November 2013, Pages 222-230
نویسندگان
, , , , ,