Showing papers by "Rodrigo Quian Quiroga published in 2004"
TL;DR: A correspondence of the ERP correlates of elemental stimulus processing between humans and rats is suggested, and it is suggested that the observed amplitude reductions may reflect habituation and/or recovery cycle processes.
45 citations
TL;DR: In this paper, the authors used wavelet denoising to determine latency-jitter of OEPs elicited by every first omission, and found that rhythmic experts showed less latency jitter of both the OEP positive wave and behavioral responses compared with non-musicians.
28 citations
01 Jan 2004
TL;DR: After generating a “noise free” signal by removing the muscle artifacts with wavelets, a dynamical analysis of the brain behavior will be performed by using nonlinear dynamics methods, which confirm that the brain dynamical behavior is more ordered during the epileptic seizure than pre-seizure stage.
Abstract: Noisy signals obtained during a tonic-clonic epileptic seizure, are usually neglected for visual inspection by the physicians due to the presence of muscle artifacts. Although noise obscures completely the recording, information about the underlying brain activity can be obtained by filtering, through the Orthogonal Wavelet Transforms, those frequencies bands associated with muscle activity. After generating a “noise free” signal by removing the muscle artifacts with wavelets, a dynamical analysis of the brain behavior will be performed by using nonlinear dynamics methods. The values for nonlinear metric invariants, like the correlation dimension and the maximum Lyapunov exponent, confirm that the brain dynamical behavior is more ordered during the epileptic seizure than pre-seizure stage.
2 citations