Abstract
The manifestations of epilepsy have been classified according to the type of seizure, and grand mal, petit mal, jacksonian and psychomotor attacks are most frequently seen. This classification, however, is not entirely satisfactory. There may be a variability in manifestations from time to time; there may not be a clearcut distinction between one type of attack and another; there may be formes frustes which cannot be classified, and many patients have more than one type of seizure. Furthermore, it is questionable whether petit mal and psychomotor seizures should be referred to as convulsive disorders, a term which is used more or less euphemistically as a synonym for epilepsy. The various types of seizures listed are differentiated not only by the clinical manifestations of the individual attack but also by the electroencephalographic picture.1 All may be classified as paroxysmal cerebral dysrhythmias. Since the advent of electroencephalography, therapy has been determined

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