To ensure efficient computer-based cerebral monitoring in the ICU and
during anaesthesia, sophisticated and sometimes expensive equipment is
needed. It is thus all the more important that the clinician should h
ave a good understanding and knowledge of the various methods involved
, the origins of the different signals and their relationships, and of
the possibilities of artefacts occurring, if the information that thi
s equipment is capable of providing is to be fully and properly utiliz
ed. The present paper describes a number of new techniques of cerebral
monitoring, and their successful application in the intensive care un
it and the operating theatre.