EEG bridge electrodes are used to derive electroencephalograms. Individual electrodes consist of sintered Ag/AgCl electrodes as recommended by the German EEG Society for routine leads. The electrode body is supplied with a screw thread for easy adjustment. The electrode may be adapted at the top or through the diagonal hole using a 2mm connector. The derivation surface of the electrode is 10mm in diameter and is covered with fabric. Before use it must be immersed in a physiological saline solution or coated with electrode paste. Care must be taken to prevent the sliver contact of the electrode coming into contact with the electrolytes. The fabric covers should be exchanged after every application.