Application to biomedical signals 141
paradigm. Deviations in amplitude and topopgraphy of components can lead to in-
ferences about the nature and locus of brain dysfunction.
One of the most commonly considered ERP component is the P300. In fact, the
“300” is a naming convention rather than the latency value since this positive de-
flection may appear between 300 and 600 ms after the stimuli of different modalities
(e.g., visual, auditory, sensory). P300 is thought to reflect processes involved in stim-
ulus evaluation or categorization. It is usually elicited using the oddball paradigm in
which low-probability target items are inter-mixed with high-probability non-target
(or “standard”) items. The topography of the P300 recorded by scalp electrodes ...