Studies of scalp level connectivity and representative channels in epilepsy

Epilepsy is a typical neurological disorder. To find the characteristics of epilepsy, scalp level connectivity is one of the interests that widely studied before. However, another aspect about the scalp representative channels, which presents the synchronous regions, has not yet been investigated. In this work, we focus on study the scalp responses of epilepsy by connectivity and representative channels. Electroencephalography (EEG), the technique to record the electrical activities of brain, has been utilized. An online EEG database of epilepsy reported from Karunya University in India was selected to be the testbed. By using two methods, coherence and correlation, the scalp level connectivity which shows the networks of scalp responses, can be mapped. Moreover, the representative channels can also be obtained based on the mentioned two methods. According to the statistical results of 94 subjects, the scalp channels F4, C4, P4, and T4 occupied higher percentages than others. These findings are beneficial for us to enrich the understanding of scalp responses in epilepsy.