Epilepsy & Seizures
Jan. 18, 2022
Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
Frontal intermittent rhythmic delta activity (FIRDA) is shown as high amplitude, intermittent, 2 to 3 Hz semirhythmic activity that has anterior prominence. This pattern was once felt to be diagnostic of mid-line cerebral pathology, such as a third ventricle tumor, but is now recognized as a nonspecific indicator of encephalopathy (Schaul et al 1981). (Contributed by Dr. Jeffrey Nicholl and Dr. David Gloss.)