How to recognize symptomatic spasms? EEG of epileptic spasms? Electromyography? Frequency? Highly dysrhythmic indistinguishable, symptomatic spasticity – EEG asymmetry, ictal EEG (presence of ictal fast activity suggestive of symptomatology, has been shown by brain magnetography to start in one hemisphere), asymmetry of symptomatology, combined partial seizures. EMG: rhombic potentials, cryptogenic, symptomatic spasms (fusco): 1.25 seconds, 1.56 seconds, not exceeding 2.40 seconds. Differential diagnosis: tonic spasms: tonic EMG after spasm; transient tonicity. Classic infantile spasms occur in clusters of progressively stronger and weaker seizures; late onset may present as a single spasm.