Theoretical and experimental study of P300 ERP in the context of Brain-computer interfaces. Part II: An experimental study of inter-and intra-subject variability based on EEG …

Abstract:

The P300 event-related potential (ERP) is closely related to cognitive processes such as: attention, working memory, consciousness, among others. This signal has been shown to have a large variability that occurs independently of the subject or the cognitive process being assessed. Detecting and characterizing this variability is important for understanding cognitive changes and using this knowledge to improve the performance of P300-based brain-machine interfaces (BCIs). There are several studies that have shown that the cognitive processes associated with P300 signal generation are highly variable between subjects, as this variability depends on factors such as: attention level, memory, age, experimental characteristics, and so on, but also that variability exists within the same subject when the same task is performed in different time periods. For this project, a study and analysis of inter- and intra-subject variability is proposed by characterizing the P300 signal according to the specificities of each subject. For this purpose, an experimental study is proposed to be performed in the laboratory of the Biological Neurocomputation Group (GNB) of Autonomous University of Madrid on 12 subjects, using the oddball paradigm to generate visual P300 ERP by electroencephalography (EEG). The proposed experiment was designed to evaluate variability in different circumstances: i) variability between the different subjects, ii) variability within the same subject during the 3 proposed experimental days, and iii) variability determined by the difference between the two helmets considered for the experiment due to their design and repositioning on the …

Año de publicación:

2021

Keywords:

Fuente:

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