Short-term monocular patching boosts the patched eye's response in visual cortex.

Abstract:

PURPOSE:Several recent studies have demonstrated that following short-term monocular deprivation in normal adults, the patched eye, rather than the unpatched eye, becomes stronger in subsequent binocular viewing. However, little is known about the site and nature of the underlying processes. In this study, we examine the underlying mechanisms by measuring steady-state visual evoked potentials (SSVEPs) as an index of the neural contrast response in early visual areas. METHODS:The experiment consisted of three consecutive stages: a pre-patching EEG recording (14 minutes), a monocular patching stage (2.5 hours) and a post-patching EEG recording (14 minutes; started immediately after the removal of the patch). During the patching stage, a diffuser (transmits light but not pattern) was placed in front of one randomly selected eye. During the EEG recording stage, contrast response functions for each eye were measured. RESULTS:The neural responses from the patched eye increased after the removal of the patch, whilst the responses from the unpatched eye remained the same. Such phenomena occurred under both monocular and dichoptic viewing conditions. CONCLUSIONS:We interpret this eye dominance plasticity in adult human visual cortex as homeostatic intrinsic plasticity regulated by an increase of contrast-gain in the patched eye.

journal_name

Restor Neurol Neurosci

authors

Zhou J,Baker DH,Simard M,Saint-Amour D,Hess RF

doi

10.3233/RNN-140472

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

381-7

issue

3

eissn

0922-6028

issn

1878-3627

pii

RNN140472

journal_volume

33

pub_type

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