Search

An interactive minicomputer system for displaying, storing and providing hard copy output of prolonged EEG recordings has been described. Perhaps the most significant feature of the system is the versatility gained by using a minicomputer. The routines developed initially solely for the display and storage of the EEG have recently been readily modified to control a different playback unit. They also form an integral part of a software package being written to set up a data base for prolonged EEG recordings and also for the study of artefacts in ambulatory recordings.

The paper describes an ambulatory EEG database. The database contains segments of AEEGs done on 45 subjects. Each epoch (1/8th second or more) of AEEG data has been annotated into 1 of 40 classes. The classes represent background activity, paroxysmal patterns and artifacts. The majority of classes have over 200 discrete epochs. The structure is flexible enough to allow additional epochs to be readily added. The database is stored on transportable media such as digital magnetic tape or hard disk and is thus available to other researchers in the field. The database can be used to design, evaluate and compare EEG signal processing algorithms and pattern recognition systems. It can also serve as an educational medium in EEG laboratories.