Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

Sign Up for a Free Account For information on discounts, see Plans & Pricing

  • 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.

  • Listen to MedLink on the go with Audio versions of each article.

Frontal intermittent rhythmic delta activity (EEG)

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.)

Related Article

Related Media