Ocular dominance plasticity: inhibitory interactions and contrast equivalence

Spiegel, D.; Baldwin, Alex S.; Hess, Robert F.

doi:10.1038/srep39913

Cited by 29 publications

(21 citation statements)

References 33 publications

(46 reference statements)

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“…In short, this indicates that the deprivation effects we observed on GMC thresholds (induced by either light-tight or kaleidoscopic patching) are quantitatively well-accounted for by a shift in interocular contrast. We argue then that, whatever the trigger, and whatever mechanisms may respond to deprivation, the effect manifests as a shift in interocular contrast (Spiegel, Baldwin, & Hess, 2017).…”

Section: Can Changes In Contrast Gain Account For Deprivation Effects?mentioning

confidence: 82%

Assessing the kaleidoscope of monocular deprivation effects

Ramamurthy

Blaser

2018

Journal of Vision

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Section: Can Changes In Contrast Gain Account For Deprivation Effects?mentioning

confidence: 82%

Assessing the kaleidoscope of monocular deprivation effects

Ramamurthy

Blaser

2018

Journal of Vision

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“…2017), and continuous flash suppression (Kim, Kim, & Blake, 2017). The shift in ocular dominance has been confirmed with EEG (Zhou, Baker, Simard, Saint-Armour, & Hess, 2015), fMRI (Binda et al, 2018), MEG (Chadnova, Reynaud, Clavagnier, & Hess, 2017), and various psychophysical tasks Spiegel, Baldwin, & Hess, 2017;Zhou, Clavagnier, & Hess, 2013). For their study on the effect of exercise, Lunghi and Sale measured the ocular dominance shift with a binocular rivalry paradigm.…”

Section: Introductionmentioning

confidence: 83%

Visual plasticity and exercise revisited: No evidence for a “cycling lane”

et al. 2019

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Experiments using enriched environments have shown that physical exercise modulates visual plasticity in rodents. A recent study (Lunghi & Sale, 2015) investigated whether exercise also affects visual plasticity in adult humans. The plastic effect they measured was the shift in ocular dominance caused by 2 hr of monocular deprivation (e.g., by an eye patch). They used a binocular rivalry task to measure this shift. They found that the magnitude of the shift was increased by exercise during the deprivation period. This effect of exercise was later disputed by a study that used a different behavioral task (Zhou, Reynaud, & Hess, 2017). Our goal was to determine whether the difference in task was responsible for that study's failure to find an exercise effect. We set out to replicate Lunghi and Sale (2015). We measured ocular dominance with a rivalry task before and after 2 hr of deprivation. We measured data from two conditions in 30 subjects. On two separate days, they either performed exercise or rested during the deprivation period. Contrary to the previous study, we find no significant effect of exercise. We hypothesize that exercise may affect rivalry dynamics in a way that interacts with the measurement of the deprivation effect.

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“…The monitor was gamma-corrected with a mean luminance of 100 cd•m −2 and a resolution of 1920 × 1080 px, placed at a viewing distance of 90 cm, in a dim-lit room. Subjects wore passive polarized ViewSonic 3D glasses that generated a luminance reduction of approximately 60% and a crosstalk of 1% [31]. Table 1.…”

Section: Apparatusmentioning

confidence: 99%

An Unexpected Spontaneous Motion-In-Depth Pulfrich Phenomenon in Amblyopia

Reynaud

Hess

2019

Vision

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The binocular viewing of a fronto-parallel pendulum with a reduced luminance in one eye results in the illusory tridimensional percept of the pendulum following an elliptical orbit in depth, the so-called Pulfrich phenomenon. A small percentage of mild anisometropic amblyopes who have rudimentary stereo are known to experience a spontaneous Pulfrich phenomenon, which posits a delay in the cortical processing of information involving their amblyopic eye. The purpose of this study is to characterize this spontaneous Pulfrich phenomenon in the mild amblyopic population. In order to assess this posited delay, we used a paradigm where a cylinder rotating in depth, defined by moving Gabor patches at different disparities (i.e., at different interocular phases), generates a strong to ambiguous depth percept. This paradigm allows one to accurately measure a spontaneous Pulfrich phenomenon and to determine how it depends on the spatio-temporal properties of stimulus. We observed a spontaneous Pulfrich phenomenon in anisometropic, strabismic, and mixed amblyopia, which is posited to be due to an interocular delay associated with amblyopic processing. Surprisingly, the posited delay was not always observed in the amblyopic eye, was not a consequence of the reduced contrast sensitivity of the amblyopic eye, and displayed a large variability across amblyopic observers. Increasing the density, decreasing the spatial frequency, or increasing the speed of the stimulus tended to reduce the observed delay. The spontaneous Pulfrich phenomenon seen by some amblyopes was variable and depended on the spatio-temporal properties of the stimulus. We suggest it could involve two conflicting components: an amblyopic delay and a blur-based acceleration.

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Ocular dominance plasticity: inhibitory interactions and contrast equivalence

Cited by 29 publications

References 33 publications

Assessing the kaleidoscope of monocular deprivation effects

Assessing the kaleidoscope of monocular deprivation effects

Visual plasticity and exercise revisited: No evidence for a “cycling lane”

An Unexpected Spontaneous Motion-In-Depth Pulfrich Phenomenon in Amblyopia

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