Левкович Кристина Михайловна
Auditory Perception During Slow-wave Sleep: a Study of Event-Related Potentials in Response to Violation of Global and Local Regularity in the Sound Sequence
Когнитивные науки и технологии: от нейрона к познанию
Sound detection remains during slow-wave sleep (SWS), but not novelty detection. To test this we compared event-related potentials (ERP) such as mismatch negativity (MMN), index of pre-attentive discrimination, and P3b, index of conscious discrimination, evoked in passive odd-ball paradigm with global (GC) and local (LC) irregularity conditions during daytime nap in SWS and waking state (WS) in 14 healthy volunteers. We observed MMN with increased amplitude in SWS in LC, while latency of MMN postponed in both conditions in SWS than in WS. The P3b amplitude was significantly higher in GC than LC in WS, but did not differ in SWS. All components of ERP in SWS demonstrated higher variability comparing to WS, especially in GC. Our results suggest that pre-attentive sound discrimination remains even in SWS, while an absence of stable MMN and P3b in response to violation of global regularity in the sound sequence in SWS supports previous data on disrupted high-level discrimination in sleep.