Effectively reducing sensory eye dominance with a push-pull perceptual learning protocol.
Summary of "Effectively reducing sensory eye dominance with a push-pull perceptual learning protocol."
Much knowledge of sensory cortical plasticity is gleaned from perceptual learning studies that improve visual performance [1-7]. Although the improvements are likely caused by modifications of excitatory and inhibitory neural networks, most studies were not primarily designed to differentiate their relative contributions. Here we designed a novel push-pull training protocol to reduce sensory eye dominance (SED), a condition that is mainly caused by unbalanced interocular inhibition [8-10]. During the training, an attention cue presented to the weak eye precedes the binocular competitive stimulation. The cue stimulates the weak eye (push) while causing interocular inhibition of the strong eye (pull). We found that this push-pull protocol reduces SED (shifts the balance toward the weak eye) and improves stereopsis more so than the push-only protocol, which solely stimulates the weak eye without inhibiting the strong eye. The stronger learning effect with the push-pull training than the push-only training underscores the crucial involvement of a putative inhibitory mechanism in sensory plasticity. The design principle of the push-pull protocol can potentially lend itself as an effective, noninvasive treatment of amblyopia.
Affiliation
Department of Psychological and Brain Sciences, University of Louisville, Louisville, KY 40292, USA.
Journal Details
This article was published in the following journal.
Name: Current biology : CB
ISSN: 1879-0445
Pages: 1864-8
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20951044
- DOI: http://dx.doi.org/10.1016/j.cub.2010.09.043
Medical and Biotech [MESH] Definitions
Perceptual Masking
The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness.
Traction
The pull on a limb or a part thereof. Skin traction (indirect traction) is applied by using a bandage to pull on the skin and fascia where light traction is required. Skeletal traction (direct traction), however, uses pins or wires inserted through bone and is attached to weights, pulleys, and ropes. (From Blauvelt & Nelson, A Manual of Orthopaedic Terminology, 5th ed)
Social Dominance
Social structure of a group as it relates to the relative social rank of dominance status of its members. (APA, Thesaurus of Psychological Index Terms, 8th ed.)
Dominance, Cerebral
Dominance of one cerebral hemisphere over the other in cerebral functions.
Figural Aftereffect
A perceptual phenomenon used by Gestalt psychologists to demonstrate that events in one part of the perceptual field may affect perception in another part.
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