Abstract

To define 'consciousness' is to describe its uses and deter-mine its boundaries, essential nature, and mechanisms. I distinguish between 'normal waking consciousness'; altered forms of waking consciousness underlying trance, absorption, hypnosis, dissociation, meditative states, drug states, and out of body experiences; and REM/dreaming and slow-wave/deep sleep - examining them by the basic characteristics and mechanisms of normal waking conscious-ness: cortical arousal, qualitative experiences, first-person subjectiv-ity, intentionality, knowing objects and self, interaction with external and inner world, united field, and reflective consciousness.