Different rules for binocular combination of luminance flicker in cortical and subcortical pathways
Segala, F. G.; Bruno, A.; Aung, M. T.; Wade, A. R.; Baker, D. H.
Show abstract
1How does the human brain combine information across the eyes? It has been known for many years that cortical normalisation mechanisms implement ocularity invariance: equalising neural responses to spatial patterns presented either monocularly or binocularly. Here we used a novel combination of electrophysiology, psychophysics, pupillometry and computational modelling to ask whether this invariance also holds for flickering luminance stimuli with no spatial contrast. We find dramatic violations of ocularity invariance for these stimuli, both in cortex and also in the subcortical pathways that govern pupil diameter. Specifically, we find substantial binocular facilitation in both pathways with the effect being strongest in cortex. Near-linear binocular additivity (instead of ocularity invariance) was also found using a perceptual luminance matching task. Ocularity invariance is therefore not a ubiquitous feature of visual processing, and the brain appears to repurpose a generic normalisation algorithm for different visual functions by adjusting the amount of interocular suppression.
Matching journals
The top 3 journals account for 50% of the predicted probability mass.
Similar papers in this journal
- During natural viewing, neural processing of visual targets continues throughout saccades 96%
- Microsaccadic suppression of peripheral perceptual detection performance as a function of foveated visual image appearance 96%
- Faces under continuous flash suppression capture attention faster than objects, but without a face evoked steady-state visual potential: Is curvilinearity responsible for the behavioral effect? 96%
Similar papers in this journal
- Attention cueing in rivalry: insights from pupillometry 97%
- Presaccadic attention enhances and reshapes the Contrast Sensitivity Function differentially around the visual field 95%
- Strength of low-frequency EEG phase entrainment to external stimuli is associated with fluctuations in the brain's internal state 95%
Similar papers in this journal
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.