Technical advantages of digital EEG

Digital EEG (DEEG) is the paperless recording of an EEG using computer-base d instrumentation. The data are stored on electronic media, such as magneti c drives or optical disks, and displayed on a monitor. DEEG has many advant ages compared to analog EEG including automatic event detection, storage, q uantification, and networking capabilities. The flexibility of DEEG allows for changes of recording parameters, such as montage, filters, and horizont al and vertical display scales retrospectively during record review. In thi s review numerous clinical EEG examples are used to demonstrate how these p ost hoc changes, particularly reformatting the montage, allow for more accu rate interpretation of the EEG.