Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations
Joint Authors
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-09
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Binda, Paola& Lunghi, Claudia. 2017. Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations. Neural Plasticity،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1193162
Modern Language Association (MLA)
Binda, Paola& Lunghi, Claudia. Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations. Neural Plasticity No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1193162
American Medical Association (AMA)
Binda, Paola& Lunghi, Claudia. Short-Term Monocular Deprivation Enhances Physiological Pupillary Oscillations. Neural Plasticity. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1193162
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1193162