Perceptual segregation of target sounds may arise from temporal coherence with cortical oscillations
Evidence
Based on magnetoencephalography findings from a similar paradigm, Elhilali et al. ( 2009 ) proposed that the perceptual segregation of the modulated target from the distractors arises from temporal coherence of cortical activity patterns with the target. Whether tACS phase modulates this temporal coherence and therewith the segregability of the target remains to be shown; the preliminary data presented here indicate a trend toward a possible effect of 4-Hz tACS phase, as in experiment 1. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4768
Categorization
- QUESTION: Worth chasing: how exactly cortical temporal coherence with a target enables segregation from spectrally overlapping distractors.
- XREF: Connects to streaming/scene-analysis reading on binding by synchrony versus other cues. — connects to: Complex listening relies on higher-level signal segregation beyond energetic masking; Auditory scene analysis organizes sound events into perceptual streams; Auditory detection of near-threshold sounds depends on the phase of ongoing brain oscillations. (+6 more)
- corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 4768
Broader Connections
- Temporal audiovisual coherence strength determines visual weighting in fusion.
#expands(0.80) - The brain computes an audiovisual coherence index before deciding to fuse sensory inputs
#expands(0.75) - Audiovisual context coherence strengthens perceptual binding of speech syllables
#responds-to(0.75) - Spatial location cues alone can segregate identical sounds into separate perceived sources
#complicates(0.70) — Dijk, Pim van, Physiology, Psychoacoustics and…, 4883 - Forward masking measures temporal processing between distinct sounds.
#qualifies(0.70)