scholarly journals Corrigendum to “Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations”

2017 ◽  
Vol 2017 ◽  
pp. 1-1
Author(s):  
Paola Binda ◽  
Claudia Lunghi
Keyword(s):  
Monocular Deprivation ◽  
Short Term ◽  
Pupillary Oscillations

scholarly journals Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Paola Binda ◽  
Claudia Lunghi
Keyword(s):  
Visual Perception ◽  
Binocular Rivalry ◽  
Latent Variable ◽  
Cortical Excitability ◽  
Ocular Dominance ◽  
Sensory Stimulation ◽  
Monocular Deprivation ◽  
Systematic Change ◽  
Short Term ◽  
Pupillary Oscillations

Short-term monocular deprivation alters visual perception in adult humans, increasing the dominance of the deprived eye, for example, as measured with binocular rivalry. This form of plasticity may depend upon the inhibition/excitation balance in the visual cortex. Recent work suggests that cortical excitability is reliably tracked by dilations and constrictions of the pupils of the eyes. Here, we ask whether monocular deprivation produces a systematic change of pupil behavior, as measured at rest, that is independent of the change of visual perception. During periods of minimal sensory stimulation (in the dark) and task requirements (minimizing body and gaze movements), slow pupil oscillations, “hippus,” spontaneously appear. We find that hippus amplitude increases after monocular deprivation, with larger hippus changes in participants showing larger ocular dominance changes (measured by binocular rivalry). This tight correlation suggests that a single latent variable explains both the change of ocular dominance and hippus. We speculate that the neurotransmitter norepinephrine may be implicated in this phenomenon, given its important role in both plasticity and pupil control. On the practical side, our results indicate that measuring the pupil hippus (a simple and short procedure) provides a sensitive index of the change of ocular dominance induced by short-term monocular deprivation, hence a proxy for plasticity.

scholarly journals Short-term plasticity of the human adult visual cortex measured with 7T BOLD

2018 ◽  
Author(s):  
Paola Binda ◽  
Jan W. Kurzawski ◽  
Claudia Lunghi ◽  
Laura Biagi ◽  
Michela Tosetti ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Frequency Tuning ◽  
Ocular Dominance ◽  
Monocular Deprivation ◽  
Homeostatic Plasticity ◽  
Short Term ◽  
Parvocellular Pathway ◽  
Human Adult ◽  
Spatial Frequencies ◽  
Ventral Pathway

AbstractVisual cortex, particularly V1, is considered to be resilient to plastic changes in adults. In particular, ocular dominance is assumed to be hard-wired after the end of the critical period. We show that short-term (2h) monocular deprivation in adult humans boosts the BOLD response to the deprived eye, changing ocular dominance of V1 vertices, consistently with homeostatic plasticity. The boost is strongest in V1, present in V2, V3 & V4 but absent in V3a and MT. Assessment of spatial frequency tuning in V1 by a population Receptive-Field technique shows that deprivation primarily boosts high spatial frequencies, consistent with a primary involvement of the parvocellular pathway. Crucially, the V1 deprivation effect correlates across participants with the perceptual increase of the deprived eye dominance assessed with binocular rivalry, suggesting a common origin. Our results demonstrate that visual cortex, particularly the ventral pathway, retains a high potential for homeostatic plasticity in the human adult.

scholarly journals Short-term monocular deprivation reduces inter ocular surround suppression

2015 ◽  
Vol 15 (12) ◽  
pp. 379 ◽  
Author(s):  
Ignacio Serrano-Pedraza ◽  
Sandra Arranz-Paraíso ◽  
Verónica Romero-Ferreiro ◽  
Jenny Read ◽  
Holly Bridge
Keyword(s):  
Monocular Deprivation ◽  
Surround Suppression ◽  
Short Term

scholarly journals BINOCULAR FUSION DURING RIVALRY INCREASES AFTER SHORT TERM MONOCULAR DEPRIVATION

2018 ◽  
Vol 18 (10) ◽  
pp. 268
Author(s):  
Yasha Sheynin ◽  
Sebastien Proulx ◽  
Robert Hess
Keyword(s):  
Monocular Deprivation ◽  
Short Term ◽  
Binocular Fusion

scholarly journals Monocular vision is intrinsically unstable: a side-effect of binocular homeostasis

2020 ◽  
Author(s):  
Alexandre Reynaud ◽  
Kévin Blaize ◽  
Frédéric Chavane ◽  
Robert F. Hess
Keyword(s):  
Monocular Deprivation ◽  
Monocular Vision ◽  
Human Vision ◽  
The Other ◽  
Contrast Threshold ◽  
Short Term ◽  
Inhibitory Circuits ◽  
Contrast Gain ◽  
The Moment ◽  
Over Time

AbstractIt is now accepted that short-term deprivation of one eye in adults results in not only a post-deprivation strengthening of the vision in the previously deprived eye but also a deterioration in the vision of the previously non-patched eye. Such monocular deprivation of 1-2 hours induces changes that last approximately 30-90 minutes. There is some support for this neuroplastic effect being the consequence of a change in the contrast gain within the binocular circuity. What is not known is when these changes in gain are initiated. One possibility is that they are initiated only once the patch is removed. The other possibility is that they are the result of a slow build up from the moment the patch is first applied.In this study, we measure monocular contrast detection thresholds of the non-deprived eye over time during the deprivation of the other eye. We show that contrast threshold increases over time during the deprivation of the other eye. This observation suggest that the patching effect is mediated by a slow build up over the deprivation period: reducing the vision of the non-deprived eye and enhancing the vision of the deprived eye reflecting reciprocal changes in sensitivity. These results highlight a hitherto unknown feature of human vision, namely that monocular vision per se is intrinsically unstable which is a consequence of the reciprocal inhibitory circuits that homeostatically regulate binocular vision. This questions a whole corpus of studies of visual function that rely on the assumption that monocular vision is intrinsically stable.

scholarly journals Visual plasticity induced by short-term monocular deprivation recovers without visual input

2018 ◽  
Vol 18 (10) ◽  
pp. 939
Author(s):  
Seung Hyun Min ◽  
Alex Baldwin ◽  
Robert Hess
Keyword(s):  
Visual Input ◽  
Monocular Deprivation ◽  
Short Term ◽  
Visual Plasticity

scholarly journals Brief localised monocular deprivation in adults alters binocular rivalry predominance retinotopically and reduces spatial inhibition

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shui’er Han ◽  
David Alais ◽  
Hamish MacDougall ◽  
Frans A. J. Verstraten
Keyword(s):  
Young Adults ◽  
Binocular Rivalry ◽  
Ocular Dominance ◽  
Monocular Deprivation ◽  
Annular Region ◽  
Gabaergic Inhibition ◽  
Central Vision ◽  
Short Term ◽  
Deprivation Period ◽  
Deprived Areas

Abstract Short-term deprivation (2.5 h) of an eye has been shown to boost its relative ocular dominance in young adults. Here, we show that a much shorter deprivation period (3–6 min) produces a similar paradoxical boost that is retinotopic and reduces spatial inhibition on neighbouring, non-deprived areas. Partial deprivation was conducted in the left hemifield, central vision or in an annular region, later assessed with a binocular rivalry tracking procedure. Post-deprivation, dominance of the deprived eye increased when rivalling images were within the deprived retinotopic region, but not within neighbouring, non-deprived areas where dominance was dependent on the correspondence between the orientation content of the stimuli presented in the deprived and that of the stimuli presented in non-deprived areas. Together, these results accord with other deprivation studies showing V1 activity changes and reduced GABAergic inhibition.

scholarly journals Short-Term Monocular Deprivation Alters GABA in the Adult Human Visual Cortex

2015 ◽  
Vol 25 (11) ◽  
pp. 1496-1501 ◽  
Author(s):  
Claudia Lunghi ◽  
Uzay E. Emir ◽  
Maria Concetta Morrone ◽  
Holly Bridge
Keyword(s):  
Visual Cortex ◽  
Monocular Deprivation ◽  
Short Term ◽  
Human Visual Cortex ◽  
Adult Human
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