Pachygyria
Birth defect of abnormally large or thick brain folds / From Wikipedia, the free encyclopedia
Pachygyria (from Greek pachy 'thick, fat' gyri) is a congenital malformation of the cerebral hemisphere. It results in unusually thick convolutions of the cerebral cortex. Typically, children have developmental delay and seizures, the onset and severity depending on the severity of the cortical malformation. Infantile spasms are common in affected children, as is intractable epilepsy.[citation needed]