STANDARD SPHENOIDAL AND MINI-SPHENOIDAL ELECTRODES - A DIRECT COMPARISON

This study was designed to directly compare EEG recordings from standard sphenoidal (SS) electrodes to those obtained from subdermal "mini-sphenoidal" (MSP) electrodes. A montage was designed to include SS electrodes, MSP electrodes, and surface temporal leads. In a series of 100 consecutive patients, 9 cases demonstrated abnormalities in the SS and MSP electrodes only. An additional 6 patients had abnormalities present only in the SS electrodes. We conclude that MSP electrodes cannot be substituted for SS electrodes in the search for suspected abnormalities in temporal, inferior, or mesial brain regions.