Induction of anaesthesia with thiopentone suxamethonium, nitrous oxide, and halothane. At induction (1) there was a immediate steep increase in amplitude associated with a partial attenuation of beta band activity and a small increase in theta and delta band activity, with these changes gradually reversing over the course of the next three minutes as the effect of the barbiturate wore off. This was followed by a decrease in beta and alpha and increase in theta and delta band activities as the halothane-nitrous oxide mixture became effective. Two large electrode artefacts are marked in the impedance channel and these correspond with transient large amplitude deflections.
Reproduced with permission from "The cerebral function analysing monitor: initial clinical experience, application and further development", D E Maynard and J L Jenkinson, Anaesthesia, 1984, Volume 39, pages 678-690.Published by Blackwell Science. http://www.blackwell-science.com/ana
