The terms “focal” and “generalized” as used to describe seizures represent abstractions and idealizations rather than ontological entities. Data from semiology, structural, and functional studies using quantitative electroencephalography (EEG), video-EEG monitoring, magnetoencephalography, magnetic resonance imaging, and positron emission tomography as well as neuropathology suggest a nosological spectrum from focal to generalized seizure-generating mechanisms. “focal” which may be counterproductive to the development of new ideas and treatments. Generalized absence seizures are discussed here with respect to changing scientific concepts and newer findings, challenging the strict dichotomy of “generalized” vs.
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