Cardiac afferent signals can facilitate visual dominance in binocular rivalry
- Department of Psychology, University of Chicago, United States
Figures
Figure 1
Cardiac binocular rivalry task.
(a) As in a typical binocular rivalry paradigm, incongruent gratings were presented to the left and right eyes, causing the subjects’ percept to alternate between the competing images. Each time the perceptually dominant image switched, subjects indicated so with a button press, and the durations of dominance were recorded. (b) The width of the bars in the grating would ‘pulse’, one in-phase and one anti-phase to the period of maximal blood pressure and thus maximal aortic baroreceptor activity following ejection of blood from the heart. (c) An example circular histogram of the cardiac phases/angles at which grating pulses peak over a full 10-min block, as recorded from an actual subject. Angles are scaled such that the R-peak is always at π radians and the offset of the T-wave is at 0 radians, thus the lower half of the circle is cardiac systole and the upper half is diastole.
Figure 2
Paired differences in subjects’ mean dominance durations.
(Left) Subjects’ mean dominance durations for grating stimuli that pulse in-phase with cardiac systole compared to those that pulse in diastole are shown on top. The colored lines denote individual subjects and connect their condition means. Bootstrap distributions and 95% confidence intervals of the paired differences between conditions are shown below. (Middle) The same visualization is shown for only stimuli presented to the left eye (Right) and only to the right eye.
Figure 3
Bayesian mixture model of interoceptive accuracy.
(a) Observed accuracies on the heartbeat discrimination task are modeled as a mixture between an at-chance Binomial distribution and an above-chance Beta-Binomial distribution, the conditional posterior predictive likelihoods of which are shown. (b) Conditional likelihoods can be combined with the estimated population prevalence of above-chance performers to assign of posterior probability of belonging to each distribution to any given subject.
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Cardiac afferent signals can facilitate visual dominance in binocular rivalry
eLife 13:RP95599.
https://doi.org/10.7554/eLife.95599.2
