Laminar pattern of sensory-evoked dynamic high-frequency oscillatory activity in the macaque auditory cortex.

ABSTRACT: High-frequency (>60 Hz) neuroelectric signals likely have functional roles distinct from low-frequency (<30 Hz) signals. While high-gamma activity (>60 Hz) does not simply equate to neuronal spiking, they are highly correlated, having similar information encoding. High-gamma activity is typically considered broadband and poorly phase-locked to sensory stimuli and thus is typically analyzed after transformations into absolute amplitude or spectral power. However, those analyses discard signal polarity, compromising the interpretation of neuroelectric events that are essentially dipolar. In the spectrotemporal profiles of field potentials in auditory cortex, we show high-frequency spectral peaks not phase-locked to sound onset, which follow the broadband peak of phase-locked onset responses.

SUBMITTER: Kajikawa Y 

PROVIDER: S-EPMC11317206 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature