Long-term adaptation to color

Tregillus, Katherine E.M.; Engel, Stephen A.

doi:10.1016/j.cobeha.2019.07.005

Cited by 16 publications

(8 citation statements)

References 37 publications

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“…54,57 The adjustments we measured could potentially represent a very long-term form of visual plasticity, though we cannot rule out a process that acts more rapidly. Color vision adjusts to changes in the environment or observer over widely varying timescales, 58 and compensation for the color losses could similarly involve multiple timescales and processes. For example, a recent study found that color percepts in anomalous observers could be enhanced after just a few days wearing glasses that increased the L versus M contrasts.…”

Section: Discussionmentioning

confidence: 99%

Color Compensation in Anomalous Trichromats Assessed with fMRI

et al. 2021

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Section: Discussionmentioning

confidence: 99%

Color Compensation in Anomalous Trichromats Assessed with fMRI

et al. 2021

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“…The adjustments we measured could potentially represent a very long-term form of visual plasticity, though we cannot rule out a process that acts more rapidly. Color vision adjusts to changes in the environment or observer over widely varying timescales [58], and compensation for the color losses could similarly involve multiple timescales and processes. For example a recent study found that color percepts in anomalous observers could be enhanced after just a few days wearing glasses that increased the L vs M contrasts [59].…”

Section: Discussionmentioning

confidence: 99%

Color compensation in anomalous trichromats assessed with fMRI

Tregillus

Isherwood

Vanston

et al. 2020

Preprint

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Anomalous trichromacy is a common form of congenital color-deficiency resulting from a genetic alteration in the photopigments of the eye's light receptors. The changes reduce sensitivity to reddish-greenish hues, yet previous work suggests that these observers may experience the world to be more colorful than their altered receptor sensitivities would predict, potentially indicating an amplification of post-receptoral signals. However, past evidence suggesting such a gain adjustment rests on subjective measures of color appearance or salience. We directly tested for neural amplification by using fMRI to measure cortical responses in color-anomalous and normal control observers. Color contrast response functions were measured in two experiments with different tasks to control for attentional factors. Both experiments showed a predictable reduction in chromatic responses for anomalous trichromats in primary visual cortex. However, in later areas V2v and V3v, chromatic responses in the two groups were indistinguishable. Our results provide direct evidence for neural plasticity that compensates for the deficiency in the initial receptor color signals and suggest that the site of this compensation is in early visual cortex.

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“…A still further possibility is that the retina and LGN can adjust in different ways or over longer timescales than are revealed by short-term adaptation experiments. Adaptation to color can occur over many timescales 74 – 77 . However, it remains uncertain whether adjustments with different time constants reflect similar processes and consequences but tracking different rates of change or if they reflect fundamentally different mechanisms that calibrate different aspects of the system.…”

Section: Compensation For Color Vision Deficienciesmentioning

confidence: 99%

Plasticity in perception: insights from color vision deficiencies

Isherwood¹,

Joyce²,

Parthasarathy³

et al. 2020

Fac Rev

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Inherited color vision deficiencies typically result from a loss or alteration of the visual photopigments absorbing light and thus impact the very first step of seeing. There is growing interest in how subsequent steps in the visual pathway might be calibrated to compensate for the altered receptor signals, with the possibility that color coding and color percepts might be less severely impacted than the receptor differences predict. These compensatory adjustments provide important insights into general questions about sensory plasticity and the sensory and cognitive processes underlying how we experience color.

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Long-term adaptation to color

Cited by 16 publications

References 37 publications

Color Compensation in Anomalous Trichromats Assessed with fMRI

Color Compensation in Anomalous Trichromats Assessed with fMRI

Color compensation in anomalous trichromats assessed with fMRI

Plasticity in perception: insights from color vision deficiencies

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