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Altered states of consciousness can be associated with artistic creativity. They also can be shared interpersonally and studied as a subject of sociological research.
 Accidental/pathologicalAn altered state of consciousness can come about accidentally through, for example, fever, infections such as meningitis, sleep deprivation, fasting, oxygen deprivation, nitrogen narcosis (deep diving), psychosis, temporal lobe epilepsy or a traumatic accident. Altered states of consciousness also occur in healthy women experiencing childbirth, hence the introduction of the term gender-specific states of consciousness.
 Intentional/recreational/spiritual/religiousAn ASC can sometimes be reached intentionally by the use of sensory deprivation, an isolation tank, sleep deprivation, lucid dreaming, hypnosis, meditation, prayer, or disciplines (e.g. Mantra Meditation, Yoga, Sufism, dream yoga, out-of-body experience or astral projection.)
ASCs can also be attained through the ingestion of psychoactive drugs such as alcohol and opiates, but more commonly with traditional hallucinogens of indigenous cultures, plants such as cannabis, psilocybin mushrooms, Peyote, and Ayahuasca. Other modern hallucinogens that some attempt to use for a similar purpose are (D)-methorphan, LSD-25, substituted phenethylamines, substituted tryptamines, and substituted amphetamines such as those listed in the books PiHKAL and TiHKAL by Dr. Alexander Shulgin, a former analytical organic chemist. These drugs are often noted as "designer drugs" by authorities and professionals or as "research chemicals" by the hallucinogen-use and distribution underground, as an attempt to avoid prosecution under the Federal Analogue Act.
 States of consciousness
|This section may be confusing or unclear to readers. (June 2010)|
- Epsilon: 0.00–0.05 Hz
- Epsilon wave patterns have not been heavily studied; however, they may be connected to intense meditative states.
- Delta brainwave patterns characterize slow wave sleep.
- Theta: 4–8 Hz Normal deep sleep state.
- Theta waves are produced between dreams, and represent an "interlude" between dreams. The waves tend to last 15-30 minutes between REM states.
- Alpha: 8–12 Hz Typical dream state.
- Alpha waves can be seen in persons watching movies or television narratives in which they are fully engrossed, mostly unaware of their surroundings.
- Beta: 12–30 Hz
- Beta waves correspond to normal conscious brain activity, ranging from calm and relaxed consciousness, to fight-or-flight panic.
- Gamma: 30–100+ Hz
- As the ability to measure brainwave frequency has significantly improved with advances in digital technology, it has become possible and practical to measure brainwave frequencies beyond 30 Hz. As more is learned about these brainwaves, a change in classifications may occur. The beta-wave level of consciousness seems to extend well beyond 30 Hz, but frequencies of 90 Hz or more (gamma waves), are shown to be associated with coordination of signals across longer distances within the brain, facilitating the completion of complex actions or associations which require the simultaneous use of multiple brain regions.
 See also
- Bundzen PV, Korotkov KG, Unestahl LE (April 2002). "Altered states of consciousness: review of experimental data obtained with a multiple techniques approach". J Altern Complement Med 8 (2): 153–65. doi:10.1089/107555302317371442. PMID 12006123.
- "Altered States of Consciousness (presentation to symposium on 'Possession States in Primitive People')". Archives of General Psychiatry, volume 15 No. 3, September 1966. http://archpsyc.ama-assn.org/cgi/content/summary/15/3/225. Retrieved 29 September 2010.
- Tart, Charles T. (1969). Altered states of consciousness: a book of readings. New York: Wiley. ISBN 0-471-84560-4.
- Tart, Charles T. (2001). States of Consciousness. Backinprint.com. ISBN 0-595-15196-5.
- Lombardo GT (2007). "An inquiry into the sources of poetic vision: Part I -- the path to inspiration". J Am Acad Psychoanal Dyn Psychiatry 35 (3): 351–71. doi:10.1521/jaap.2007.35.3.351. PMID 17907906. http://www.extenza-eps.com/doi/abs/10.1521/jaap.2007.35.3.351.
- Spivak D. Altered states of society: a tentative approach // A World in Transition: Humankind and Nature. — Dordrecht: Kluwer Academic Publishers, 1999. — P. 33-42.
- Oill PA (July 1976). "Infectious disease emergencies. Part 1: Patients presenting with an altered state of consciousness". West. J. Med. 125 (1): 36–46. PMC 1237177. PMID 782042. //www.ncbi.nlm.nih.gov/pmc/articles/PMC1237177/.
- Andrzej Kokoszka: States of consciousness: models for psychology and psychotherapy
- Gruzdev N. V., Spivak D. L. An exploratory investigation into the association of neuroticization, cognitive style, and spirituality to reported altered states of consciousness in women experiencing childbirth // International Journal of Transpersonal Studies. — 2006. — Vol. 25, No. 1. P. 56-61.
- Gender-specific altered states of consciousness / D. L. Spivak, N. P. Bechtereva, S. G. Danko, L. I. Spivak, K. Wistrand // International Journal of Transpersonal Studies. — 1998. — № 2. — P. 181-185.
 Further reading
- Bourguignon, Erika (1973). Religion, altered states of consciousness, and social change. Ohio State Univ. Press, Columbus. ISBN 0814201679 Full text
- Hoffman, Kay (1998). The Trance Workbook: Understanding & using the power of altered states. Translated by Elfie Homann, Clive Williams, and Dr. Christliebe El Mogharbel. Translation edited by Laurel Ornitz. ISBN 0-8069-1765-2
- Locke, R. G.; Kelly, E. F. (1985). "A Preliminary Model for the Cross-Cultural Analysis of Altered States of Consciousness". Ethos 13: 3. doi:10.1525/eth.1985.13.1.02a00010.
- James, William The Varieties of Religious Experience (1902) ISBN 0-14-039034-0
- Roberts, T.B. (Ed.) (2001). Psychoactive Sacramentals: Essays on Entheogens and Religion. San Francisco: Council on Spiritual Practices.
- Roberts, T.B. and P.J. Hruby. (1995–2002). Religion and Psychoactive Sacraments: An Entheogen Chrestomathy . Online archive.  ISBN 1-889725-00-5
- Roberts, T.B. “Chemical Input—Religious Output: Entheogens.” Chapter 10 of Where God and Science Meet: Vol. 3: The Psychology of Religious Experience. Edited by Robert McNamara. Westport, CT: Praeger/Greenwood, 2006. ISBN 0-275-98788-4
- Weinel, Jonathan. “Bass Drum, Saxophone & Laptop: Real-time psychedelic performance software.” eContact! 12.4 — Perspectives on the Electroacoustic Work / Perspectives sur l’œuvre électroacoustique (August 2010). Montréal: CEC.
- Wier, Dennis R. Trance: From Magic to Technology. Transmedia, 1995. ISBN 1-888428-38-4