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- W4366769397 abstract "Abstract Sensory eye dominance occurs when the visual cortex weighs one eye’s data more heavily than those of the other. Encouragingly, mechanisms underlying sensory eye dominance in human adults retain a certain degree of plasticity. Notably, perceptual training using dichoptically presented motion signal-noise stimuli has been shown to elicit changes in sensory eye dominance both in visually impaired and normal observers. However, the neural mechanisms underlying these learning-driven improvements are not well understood. Here, we measured changes in fMRI responses before and after a five-day visual training protocol to determine the neuroplastic changes along the visual cascade. Fifty visually normal observers received training on a dichoptic or binocular variant of a signal-in-noise (left-right) motion discrimination task over five consecutive days. We show significant shifts in sensory eye dominance following training, but only for those who received dichoptic training. Pattern analysis of fMRI responses revealed that responses of V1 and hMT+ predicted sensory eye dominance for both groups, but only before training. After dichoptic (but not binocular) visual training, responses of V1 and hMT+ could no longer predict sensory eye dominance. Our data suggest that perceptual training-driven changes in eye dominance are driven by a reweighting of the two eyes’ data in both primary and task-related extrastriate visual areas. These findings may provide insight into developing region-targeted rehabilitative paradigms for the visually impaired, particularly those with severe binocular imbalance." @default.
- W4366769397 created "2023-04-25" @default.
- W4366769397 creator A5032570079 @default.
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- W4366769397 date "2023-04-22" @default.
- W4366769397 modified "2023-10-04" @default.
- W4366769397 title "Sensory Eye Dominance Plasticity in the Human Adult Visual Cortex" @default.
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- W4366769397 doi "https://doi.org/10.1101/2023.04.21.537873" @default.
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