Objectives: By using the Wavelet Transform, a time frequency representation with nearly optimal resolution, we studied responses to stimulation in the `alpha' range (10 Hz). Methods: Visual evoked responses of 10 healthy subjects were studied with 3 different stimulus types (no-task VEP, non-target and target stimulus). Results: Upon all the stimulus types, event-related responses in the 10 Hz ...

This study presents an analysis on Visual Evoked Potentials (VEPs) recorded mainly from the occipital area of the brain. Accumulation of segmented windows (time locked averaging), Coiflet wavelet decomposition with dyadic filter bank and Principle Component Analysis (PCA) of three stages were utilized in order to decompose the recorded VEPs signal, to improve the Signal to Noise Ratio (SNR) and...