<P> General anaesthesia has many purposes, including: </P> <Ol> <Li> Analgesia (loss of response to pain) </Li> <Li> Amnesia (loss of memory) </Li> <Li> Immobility (loss of motor reflexes) </Li> <Li> Hypnosis (unconsciousness) </Li> <Li> Paralysis (skeletal muscle relaxation) </Li> </Ol> <Li> Analgesia (loss of response to pain) </Li> <Li> Amnesia (loss of memory) </Li>

Using guedel's classification nitrous oxide maintains patients in which stage