The sustained field does not distinguish melodic from tonic sequences
Evidence
In the melodic source generator (upper panel), the SF builds up (negatively) over about 500 ms following the P2m to the first note, from about 250 to 750 ms after the onset of the sequence. The magnitude of the SF decreases down to about ‑20 nAm below baseline for both the tonic and melodic sequences; it appears to get a little more negative towards the end of the melodic sequence, but not a great deal. Then, following the P2m of the last note, the SF decays back up to the baseline level over about 500 ms in both the tonic and melodic sequences. Statistically, over the course of the entire sequence, the SFs for the tonic and melodic conditions are not different, so it appears that the process that produces the SF does not distinguish the condition in which the notes produce a melody (SF differences based on melodic sources: ‑1973. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4717
Categorization
Category: Causal Relationships
- DEFINE: Defines the sustained field (SF): a slow negative source that builds over ~500 ms after a note’s onset and decays to baseline over ~500 ms after the last note.
Related
- The sustained field response does not encode whether tones form a melody (similarity 0.92)
- Melodic differences in brain responses vanish once the sustained field is removed (similarity 0.87)
- The sustained cortical field does not differentiate melody from repeated tonic notes (similarity 0.87)
- Sustained field activity does not track melodic structure. (similarity 0.85)
- Sustained cortical fields can be measured over long musical sequences. (similarity 0.84)
- Pitch-change sequence processing drives larger N1m and P2m responses than constant notes (similarity 0.79)