Time-frequency analysis of event-related brain recordings: Effect of noise on power.

ABSTRACT: In neuroscience, time-frequency analysis is widely used to investigate brain rhythms in brain recordings. In event-related protocols, it is applied to quantify how the brain responds to a stimulation repeated over many trials. We here focus on two common measures: the power of the transform for each single trial averaged across trials, avgPOW; and the power of the transform of the average evoked potential, POWavg. We investigate the influence of additive noise on these two measures. We quantify the expected effect using theoretical calculations, simulated data and experimental brain recordings. We also consider the case of color noise. We extract the main factors influencing the effect of noise on POWavg and avgPOW, such as the noise variance, the number of trials, the sampling rate, the t

SUBMITTER: Marrelec G 

PROVIDER: S-EPMC11422058 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature