Asymmetric high-contrast masking in S cone increment and decrement pathways
| Autor: | Scott H. Gabree, Rhea T. Eskew, Timothy G. Shepard |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Masking (art)
Color vision media_common.quotation_subject Perceptual Masking Visual system Retinal Cone Photoreceptor Cells 050105 experimental psychology Contrast Sensitivity Young Adult 03 medical and health sciences 0302 clinical medicine Nuclear magnetic resonance Optics Sensory threshold Humans Contrast (vision) Visual Pathways 0501 psychology and cognitive sciences media_common Physics Color Vision business.industry 05 social sciences Cone (category theory) Middle Aged Cone Opsins Sensory Systems Ophthalmology Sensory Thresholds business 030217 neurology & neurosurgery |
| Zdroj: | Vision Research. 151:61-68 |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/j.visres.2017.06.017 |
| Popis: | Physiological, anatomical, and psychophysical evidence points to important differences between visual processing of short-wave cone increments and decrement (S+ and S-) stimuli. The present study uses the pedestal discrimination paradigm to investigate potential differences, using S+ and S- tests presented on (L)ong-wave, (M)edium-wave, S, L+M, L-M, and achromatic pedestals, of both contrast polarities. Results show that high contrast 'purplish' (S+ or -(L+M)) pedestals produce substantially more masking of both S+ and S- tests than 'yellowish' (S- or +(L+M)) pedestals do. The other pedestals produce no masking. These findings suggest greater nonlinearity - either a static nonlinearity or contrast gain control - in the mechanisms responsible for the 'purplish' polarity, likely the S ON pathway. |
| Databáze: | OpenAIRE |
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