Individual resting-state alpha peak frequency and within-trial changes in alpha peak frequency both predict visual dual-pulse segregation performance
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Although sensory input is continuous, information must be combined over time to guide action and cognition, leading to the proposal of temporal sampling windows. A number of studies have suggested that a 10-Hz sampling window might be involved in the "frame rate" of visual processing. To investigate this, we tested the ability of participants to localize and enumerate 1 or 2 visual flashes presented either at near-threshold or full-contrast intensities, while recording magnetoencephalography. The inter-stimulus interval (ISI) between the 2 flashes was varied across trials. Performance in distinguishing between 1 and 2 flashes was linked to the alpha frequency, both at the individual level and trial-by-trial. Participants with a higher resting-state alpha peak frequency showed the greatest improvement in performance as a function of ISI within a 100-ms time window, while those with slower alpha improved more when ISI exceeded 100 ms. On each trial, correct enumeration (1 vs. 2) performance was paired with faster pre-stimulus instantaneous alpha frequency. Our results suggest that visual sampling/processing speed, linked to peak alpha frequency, is both an individual trait and can vary in a state-dependent manner.
Details
Original language | English |
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Pages (from-to) | 5455-5466 |
Number of pages | 12 |
Journal | Cerebral cortex (New York, N.Y. : 1991) |
Volume | 32 |
Issue number | 23 |
Publication status | Published - 21 Nov 2022 |
Peer-reviewed | Yes |
External IDs
PubMed | 35137008 |
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ORCID | /0000-0001-6870-5224/work/147142877 |
Keywords
ASJC Scopus subject areas
Keywords
- individual alpha frequency, instantaneous alpha frequency, temporal integration, temporal segregation, visual processing speed, Time Perception, Magnetoencephalography, Humans, Visual Perception, Time