Portions of the brains of three Rhesus monkeys were examined by electron microscopy. No current was applied to the brain of the first monkey. The second and third each received ten hours of application of electric current during a five-week period, one hour per application. One monkey received variations of sine current only, the other, variations of square-wave current only. Sections from the brains of all three were examined by light and electron microscopy. No changes attributable to the application of electric current were found.
(C) 1972 American Society of Anesthesiologists, Inc.