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- W2024200766 abstract "Abstract Patients with Leber's hereditary optic neuropathy (LHON) have loss of central vision with severe damage of small‐caliber fibers of the papillomacular bundle and optic nerve atrophy. The aim of this study was to define the presence and topographical distribution of brain grey matter (GM) and white matter (WM) injury in LHON patients using voxel‐based morphometry (VBM). The correlation of such changes with neuro‐ophthalmologic findings and measurements of peripapillary retinal nerve fiber layer (RNFL) thickness by optical coherence tomography (OCT) was also assessed. Dual‐echo and fast‐field echo scans were acquired from 12 LHON patients and 12 matched controls. VBM analysis was performed using SPM5 and an ANCOVA model. A complete neuro‐ophthalmologic examination, including standardized automated Humphrey perimetry as well as average and temporal peripapillary RNFL thickness measurements were obtained in all the patients. Compared with controls, average peripapillary RNFL thickness was significantly decreased in LHON patients. LHON patients also had significant reduced GM volume in the bilateral primary visual cortex, and reduced WM volume in the optic chiasm, optic tract, and several areas located in the optic radiations (OR), bilaterally. Visual cortex and OR atrophy were significantly correlated with average and temporal peripapillary RNFL thickness ( P < 0.001; r values ranging from 0.76 to 0.89). Brain damage in patients with LHON is not limited to the anterior visual pathways, but extends posteriorly to the OR and the primary visual cortex. Such a damage to the posterior parts of the visual pathways may be due either to trans‐synaptic degeneration secondary to neuroaxonal damage in the retina and optic nerve or to local mitochondrial dysfunction. Hum Brain Mapp, 2010. © 2010 Wiley‐Liss, Inc." @default.
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- W2024200766 date "2010-11-16" @default.
- W2024200766 modified "2023-10-11" @default.
- W2024200766 title "Evidence for retrochiasmatic tissue loss in Leber's hereditary optic neuropathy" @default.
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- W2024200766 doi "https://doi.org/10.1002/hbm.20985" @default.
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