INTRACRANIAL ELECTROENCEPHALOGRAPHIC AND EVOKED-POTENTIAL RECORDING FROM INTRAVASCULAR GUIDE WIRES

We describe a technique for recording electroencephalographic and evok ed-potential information directly from the cerebral hemispheres and br ain stem, via an endovascular approach. Recordings were performed with polytef-insulated guide wires in the course of interventional angiogr aphies in 23 patients. All registrations were compared with simultaneo us recordings from extracranial electrodes. This preliminary study rai ses the possibility that this technique may help to explore the electr ic activity of deep cerebral structures otherwise accessible only by s tereotactic puncture or electrode insertion.