Fig. 1. Electroocculogram from a subject during baseline awake (base), during propofol-induced loss of consciousness after administration of saline (ns), when unconsciousness was reversed 10 min after administration of physostigmine (physo), and during recovery when fully awake (rec). Note that the electroocculoencephalography (EOG) response during physostigmine-evoked reversal of unconsciousness shows a longer latency and a smaller amplitude. Each trace is an average of five EOG responses recorded from the same subject.