Respiration aligns perception with neural excitability
- Institute for Biomagnetism and Biosignal Analysis, University of Münster, Germany
- Otto Creutzfeldt Center for Cognitive and Behavioral Neuroscience, University of Münster, Germany
- Institute of Psychology, University of Münster, Germany
- Centre for Cognitive Neuroimaging, Institute of Neuroscience and Psychology, University of Glasgow, United Kingdom
Figures
Figure 1 with 1 supplement
Task and behavioral results.
(a) In the experimental task, participants kept their gaze on a central fixation cross while a brief, near-threshold Gabor patch (magnified for illustrative purposes) was randomly presented either …
Figure 1—figure supplement 1
Group-level distribution of individual hit rates across all trials.
Figure 2 with 2 supplements
Respiration phase modulates performance.
(a) The first 20 trials of each run were discarded to allow initiation of the QUEST staircase (inset shows contrast variation of the full run). Extending the behavioral analysis shown in Figure 1, …
Figure 2—figure supplement 1
Individual psychometric functions (PsychF), fitted on the full data set.
For each participant, PsychF changes across the respiration cycle were assessed by subsequently fixing all parameters except the PsychF threshold (vertical lines) and refitting the PsychF on subsets …
Figure 2—figure supplement 2
Individual PsychF thresholds, iteratively refitted across respiration phase bins.
The psychometric function was first fitted to the full data set (black function). All parameters except the threshold were then fixed and used as priors for fitting the psychometric function …
Figure 3 with 1 supplement
Pre- and peristimulus alpha suppression determine perceptual accuracy.
(a) Frequency spectra show prestimulus alpha suppression (interval [–1 0] s before target onset) for detected (hits, green) versus undetected targets (misses, yellow) averaged over bilateral …
Figure 3—figure supplement 1
Band-specific topographies over time.
Whole-scalp topographic distribution of normalized pre- and peristimulus power differences between hits and misses, separately for each frequency band. Channels with significant differences in the …
Figure 4 with 2 supplements
Respiration-locked alpha power modulations drive perception effects.
(a) Left panel shows modulation index as a measure of phase-amplitude coupling across frequencies and corresponding t values from cluster-permutation testing. Coupling was significant …
Figure 4—figure supplement 1
Individual phase-triggered averages (top), normalized respiration time courses (plus mean respiration time course in bold; middle), and normalized PsychF threshold over the respiration cycle (bottom).
Figure 4—figure supplement 2
Instantaneous correlation of beta power and perceptual sensitivity.
Group-level correlation between individual beta and PsychF threshold courses (averaged between 14 and 30 Hz) with significant phase vector (length of seven time points) marked by dark gray dots …
