Sep. 14, 2021
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.
(A) Placement of electrodes for EOG recording. (B) Normal EOG recording. An electro-oculogram measures: (1) voltage potential between cornea and Bruch membrane and (2) voltage potential changes with illumination. Arden ratio, light peak: dark trough (nl >1.8). Abnormality suggests diseases that primarily affect the retinal pigment epithelium. (Contributed by Dr. James Walters.)