thre re varygin depths of anaesthesia as described originally with a single
agent ( ether/chloroform etc)
http://en.wikipedia.org/wiki/Guedel%27s_classification
(or google for Guedel)

not strictly the same nowadays as anaesthetists use several different drugs.
http://www.biology-online.org/dictio...ed_anaesthesia

Depth of Anaesthesia is a balance between the amount of drugs you are given
and the degree of surgical stimulation ( how big a hole they are making )

Dreaming is reported at the lighter stages of anaesthesia.


DOI: Anesthetist

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