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• W2743991696 abstract "Amblyopia is a developmental disorder that results in a wide range of visual deficits. One proven approach to recovering vision in adults with amblyopia is perceptual learning (PL). Recent evidence suggests that neuromodulators can enhance adult plasticity. In this pilot study, we asked whether donepezil, a cholinesterase inhibitor, enhances visual PL in adults with amblyopia. Nine adults with amblyopia were first trained on a low-contrast single-letter identification task while taking a daily dose (5 mg) of donepezil throughout training. Following 10,000 trials of training, participants showed improved contrast sensitivity for identifying single letters. However, the magnitude of improvement was no greater than, and the rate of improvement was slower than, that obtained in a previous study in which six adults with amblyopia were trained using an identical task and protocol but without donepezil (Chung, Li & Levi, 2012). In addition, we measured transfer of learning effects to other tasks and found that for donepezil, the post-pre performance ratio in both a size-limited (acuity) and a spacing-limited (crowding) task was not statistically different from those found in the previous study without donepezil administration. After an interval of several weeks, six participants returned for a second course of training on identifying flanked (crowded) letters, again with concurrent donepezil administration. Although this task has previously been shown to be highly amenable to PL in adults with amblyopia (Chung et al, 2012; Hussain et al., 2012), only one observer in our study showed any learning over 10,000 trials of training. Auxiliary experiments showed that the lack of a learning effect on this task during donepezil administration was not due to either the order of training of the two tasks or the use of a sequential training paradigm. Our results reveal that cholinergic enhancement with donepezil during training does not improve or speed up PL of single-letter identification in adults with amblyopia, and importantly, it may even halt learning and transfer related to a crowding task." @default.
• W2743991696 created "2017-08-17" @default.
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• W2743991696 date "2017-08-07" @default.
• W2743991696 modified "2023-10-15" @default.
• W2743991696 title "Donepezil Does Not Enhance Perceptual Learning in Adults with Amblyopia: A Pilot Study" @default.
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• W2743991696 doi "https://doi.org/10.3389/fnins.2017.00448" @default.
• W2743991696 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5545606" @default.
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• W2743991696 hasPublicationYear "2017" @default.
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