Abrupt interaural phase changes evoke P1-N1-P2 cortical responses
Evidence
Figure 2 shows responses analysed in the time domain (left panels) and the frequency domain (right) for a single IPM condition (±67.8°). Individual (gray lines) and group mean (black) for the slowest IPM rate (3.4 Hz; Fig. 3 , top ), typically displayed a P1-N1-P2 response to each IPD transition, with component latencies of approximately 50, 100 and 175 ms, respectively. The next two harmonics (6.8 and 10.2 Hz) were also observed clearly in the response to the 3.4-Hz IPM. Evoked responses to the intermediate IPM rate (6.8 Hz; Fig. 2 ) became steady state at the same rate as the IPM, and so we term this response the IPM-FR. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2964
Figure 2 shows responses analysed in the time domain (left panels) and the frequency domain (right) for a single IPM condition (±67.8°). Individual (gray lines) and group mean (black) for the slowest IPM rate (3.4 Hz; Fig. 3 , top ), typically displayed a P1-N1-P2 response to each IPD transition, with component latencies of approximately 50, 100 and 175 ms, respectively. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2965
Categorization
- DEFINE: Defines IPM-FR: the steady-state evoked cortical response that follows interaural phase modulation at the modulation rate.
- corroborated: 3 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2964; Dijk, Pim van, Physiology, Psychoacoustics and…, 2965
- XREF: connects to: Low- and high-frequency binaural brainstem pathways prefer opposite interaural phase ranges; Slow interaural-phase modulation evokes transient P1-N1-P2 waves while faster rates produce steadier following responses; Slow IPD transitions evoke a classic P1-N1-P2 auditory evoked response in the EEG