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Retinal Structures and Visual Cortex Activity are Impaired Prior to Clinical Vision Loss in Glaucoma

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Title
Retinal Structures and Visual Cortex Activity are Impaired Prior to Clinical Vision Loss in Glaucoma
Author(s)
Matthew C. Murphy; Ian P. Conner; Cindy Y. Teng; Jesse D. Lawrence; Zaid Safiullah; Bo Wang; Richard A. Bilonick; Seong-Gi Kim; Gadi Wollstein; Joel S. Schuman; Kevin C. Chan
Publication Date
2016-08
Journal
SCIENTIFIC REPORTS, v.6, no., pp.31464 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Glaucoma is the second leading cause of blindness worldwide and its pathogenesis remains unclear. In this study, we measured the structure, metabolism and function of the visual system by optical coherence tomography and multi-modal magnetic resonance imaging in healthy subjects and glaucoma patients with different degrees of vision loss. We found that inner retinal layer thinning, optic nerve cupping and reduced visual cortex activity occurred before patients showed visual field impairment. The primary visual cortex also exhibited more severe functional deficits than higher-order visual brain areas in glaucoma. Within the visual cortex, choline metabolism was perturbed along with increasing disease severity in the eye, optic radiation and visual field. In summary, this study showed evidence that glaucoma deterioration is already present in the eye and the brain before substantial vision loss can be detected clinically using current testing methods. In addition, cortical cholinergic abnormalities are involved during trans-neuronal degeneration and can be detected non-invasively in glaucoma. The current results can be of impact for identifying early glaucoma mechanisms, detecting and monitoring pathophysiological events and eye-brain-behavior relationships, and guiding vision preservation strategies in the visual system, which may help reduce the burden of this irreversible but preventable neurodegenerative disease. © The Author(s) 2016
URI
http://pr.ibs.re.kr/handle/8788114/3137
DOI
10.1038/srep31464
ISSN
2045-2322
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > Journal Papers (저널논문)
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