This volume of International Review of Neurobiology concentrates on modern concepts of focal epileptic networks. The volume addresses specific topics such as seizures (including transition and termination), limbic networks, alteration of metabolism, and neocortical focus and malformation of cortical development, among others. Published since 1959, International Review of Neurobiology is a well-known series appealing to neuroscientists, clinicians, psychologists, physiologists, and pharmacologists. Led by an internationally renowned editorial board, this important serial publishes both eclectic volumes made up of timely reviews, and thematic volumes that focus on recent progress in a specific area of neurobiology research. - Our knowledge about the mechanisms involved in pathophysiology of epilepsy has rapidly expanded during last decade - This special volume brings overview about modern concepts of epileptic focus organization and about the altered neural network dynamics which results in propensity of the brain tissue to generate spontaneous and repeated seizures