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Altered states of consciousness: all studies

Page 245 of 271: studies 2,441 to 2,450 of 2,708, newest first. Back to the altered states of consciousness overview

Research

Acute psychological and physiological effects of psilocybin in healthy humans: a double-blind, placebo-controlled dose?effect study

Psychopharmacology March 1, 2004 Felix Hasler, Ulrike Grimberg, Marco A. Benz et al. 458 citations

RationaleSerotonin (5-Hydroxytryptamine, 5-HT) receptors play an important role in perception, affect regulation and attention. Pharmacological challenge with the 5-HT(2A) agonist psilocybin (PY) is useful in studying the neurobiological basis of cognition and consciousness.ObjectiveInvestigation of dose-dependent effects of PY on psycho(patho)logical and physiological parameters.MethodsEight...

Hallucinogens.

Pharmacology & Therapeutics February 1, 2004 David E Nichols 1 citation

Hallucinogens (psychedelics) are psychoactive substances that powerfully alter perception, mood, and a host of cognitive processes. They are considered physiologically safe and do not produce dependence or addiction. Their origin predates written history, and they were employed by early cultures in a variety of sociocultural and ritual contexts. In the 1950s, after the virtually contemporaneous...

Altered awareness of voluntary action after damage to the parietal cortex.

Nature Neuroscience January 2004 Angela Sirigu, Elena Daprati, Sophie Ciancia et al.

A central question in the study of human behavior is the origin of willed action. EEG recordings of surface brain activity from human subjects performing a self-initiated movement show that the subjective experience of wanting to move follows, rather than precedes, the 'readiness potential'--an electrophysiological mark of motor preparation. This raises the issue of how conscious experience of...

Cheating the ferryman: A new paradigm of existence?

Journal of Near-Death Studies 2004 Anthony A. Peake 2 citations

Survival after death of the body is arguably the most fundamental question facing sentient beings. I present a rationalistic argument for what occurs subjectively at the moment of death, using insights from quantum physics, neurology, perceptual science, psychiatry, and Gnosticism. At the point of death, three events are brought about by neurotransmitters flooding the temporal lobes. First, the...

How Do Shamans Encounter Spirits? : Trance and Possession among Okinawan Yuta Reconsidered

Japanese review of cultural anthropology 2004 Hidekazu Sensui 1 citation

This article examines how a shamanistic worldview is constructed and sustained in Okinawa despite the near lack of the occurrence of trance state among shamans. Observers have typically explained the strong reality that shamans ascribe to supernatural beings by referring to their altered states of consciousness. Such a psychologizing perspective, however, does violence to the distinctive ways...

Art and Spirit: The Artistic Brain, the Navajo Concept of Hozho, and Kandinsky’s “Inner Necessity ”

International Journal of Transpersonal Studies 2004 Charles D. Laughlin 5 citations

Most traditional art forms around the planet are an expression of the spiritual dimension of a culture’s cosmology and the spiritual experiences of individuals. Religious art and iconography often reveal the hidden aspects of spirit as glimpsed through the filter of cultural significance. Moreover, traditional art, although often highly abstract, may actually describe sensory experiences...

Ayahuasca : liane de l'âme, chamanes et soumission chimique

Annales de Toxicologie Analytique 2004 Gilbert Pépin, Gaëlle Duffort 10 citations

Les plantes hallucinogènes sont utilisées dans les sociétés primitives depuis des siècles, mais jusqu'à maintenant leur usage se limitait à quelques individus chamanes, médecins-sorciers, etc... lors de rites religieux. Actuellement un regain d'intérêt est constaté pour les hallucinogènes naturels en rapport avec un mouvement de « retour à la nature » car la diffusion de ces substances est...

Enhanced power within a specific band of theta activity in one person while another receives circumcerebral pulsed magnetic fields: a mechanism for cognitive influence at a distance?

Perceptual and Motor Skills December 2003 Michael A. Persinger, Stanley A. Koren, E W Tsang

Four pairs of adult siblings served once as either the stimulus or the response person in two sessions separated by one week. While the brain of the stimulus person, who was seated in a closed chamber, was exposed successively to six different complex magnetic fields for 5 min. each quantitative monopolar electroencephalographic measurements over the frontal, temporal, parietal, and occipital...