Extrafoveally applied flashing light affects contrast thresholds of achromatic and S-cone isolating, but not L-M cone modulated stimuli

Öze, Attila; Puszta, András; Buzás, Péter; Kóbor, Péter; Braunitzer, Gábor; Nagy, Attila

doi:10.1016/j.neulet.2018.05.015

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…Furthermore, the application of the steady- and pulsed-pedestal paradigms showed that flicker adaptation was related to desensitization of the M pathway but not the P pathway in humans 44 . Additionally, the reduced sensitivity of the M pathway was larger for 10 Hz than for 2 Hz stimulation, which is in agreement with another study 45 and our results.…”

Section: Discussionsupporting

confidence: 94%

Frequency-dependent dynamics of steady-state visual evoked potentials under sustained flicker stimulation

Łabęcki,

Nowicka,

Wróbel

et al. 2024

Sci Rep

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Steady-state visual evoked potentials (SSVEP) are electroencephalographic signals elicited when the brain is exposed to a visual stimulus with a steady frequency. We analyzed the temporal dynamics of SSVEP during sustained flicker stimulation at 5, 10, 15, 20 and 40 Hz. We found that the amplitudes of the responses were not stable over time. For a 5 Hz stimulus, the responses progressively increased, while, for higher flicker frequencies, the amplitude increased during the first few seconds and often showed a continuous decline afterward. We hypothesize that these two distinct sets of frequency-dependent SSVEP signal properties reflect the contribution of parvocellular and magnocellular visual pathways generating sustained and transient responses, respectively. These results may have important applications for SSVEP signals used in research and brain-computer interface technology and may contribute to a better understanding of the frequency-dependent temporal mechanisms involved in the processing of prolonged periodic visual stimuli.

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Section: Discussionsupporting

confidence: 94%

Frequency-dependent dynamics of steady-state visual evoked potentials under sustained flicker stimulation

Łabęcki,

Nowicka,

Wróbel

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

Luminance and chromaticity discrimination sensitivities right after an abrupt decrease in background luminance

Son,

Nagai

2024

Color Research & Application

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When we enter a dark place, such as a tunnel, from a bright exterior, our visual sensitivities take some time to adapt to lower light levels. However, there have been few reports on how quickly luminance and chromaticity discrimination sensitivities recover in this situation. This study aims to quantify the time course of discrimination sensitivity for luminance and chromaticity directions after an abrupt decrease in background luminance. In each trial, the background luminance was decreased from 100 to 1 cd/m2. Subsequently, one target and three reference stimuli of different colors were presented under four stimulus‐onset asynchrony (SOA) conditions. The participants discriminated the target stimulus from reference stimuli. The results showed that discrimination sensitivity was the lowest right after the background luminance changed and gradually improved with SOAs. The sensitivity decreases differed across color directions, with the greatest decrease in luminance, a moderate decrease in S−(L + M), and a negligible change in L−M. However, statistically significant differences were observed only between luminance and L−M, suggesting that the sensitivity decrease after the abrupt decrease in background luminance did not significantly differ between the chromaticity directions. We speculate that these results stem from the interaction between chromatic perception and luminance adaptation, and possibly from rod intrusions.

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Extrafoveally applied flashing light affects contrast thresholds of achromatic and S-cone isolating, but not L-M cone modulated stimuli

Cited by 2 publications

References 43 publications

Frequency-dependent dynamics of steady-state visual evoked potentials under sustained flicker stimulation

Frequency-dependent dynamics of steady-state visual evoked potentials under sustained flicker stimulation

Luminance and chromaticity discrimination sensitivities right after an abrupt decrease in background luminance

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