The contemporary perspective on altered states of conscious is surveyed as an introduction to commentaries on Kallio and Revonsuo's lead article in Contemporary Hypnosis(2003). It is noted that the study of consciousness, unconscious processing, and altered states of consciousness are central issues in neuroscience, heralding fresh approaches to the neuroscientific understanding of hypnosis....
The article reviews the current knowledge regarding altered states of consciousness (ASC) (a) occurring spontaneously, (b) evoked by physical and physiological stimulation, (c) induced by psychological means, and (d) caused by diseases. The emphasis is laid on psychological and neurobiological approaches. The phenomenological analysis of the multiple ASC resulted in 4 dimensions by which they...
These data show that 5-HT dysfunction occurs in MDMA users, is related to users' MDMA consumption, and is independent of cannabis use. The results do not suggest that self-medication explains this relationship, because the deficit was related to total MDMA consumption but not frequency of consumption. The results are thus consistent with the thesis that MDMA consumption causes 5-HT impairment...