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  1. The epistemics of ayahuasca visions.Benny Shanon - 2010 - Phenomenology and the Cognitive Sciences 9 (2):263-280.
    In this paper, I discuss substance-induced visions and consider their epistemic status, meaning, and modes of proper interpretation. I focus on the visions induced by ayahuasca, a powerful psychoactive plant-made brew that has had a central status and role in the indigenous tribal cultures of the upper Amazonian region. The brew is especially famous for the visions seen with it. These are often coupled with personal psychological insights, mentations concerning topics of special significance to one, intellectual (notably, philosophical and metaphysical) (...)
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  • Genuine and drug-induced synesthesia: A comparison.Christopher Sinke, John H. Halpern, Markus Zedler, Janina Neufeld, Hinderk M. Emrich & Torsten Passie - 2012 - Consciousness and Cognition 21 (3):1419-1434.
    Despite some principal similarities, there is no systematic comparison between the different types of synesthesia . This comprehensive review compares the three principal types of synesthesia and focuses on their phenomenological features and their relation to different etiological models. Implications of this comparison for the validity of the different etiological models are discussed.Comparison of the three forms of synesthesia show many more differences than similarities. This is in contrast to their representation in the literature, where they are discussed in many (...)
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  • Can synaesthesia be cultivated?: Indications from surveys of meditators.Roger Walsh - 2005 - Journal of Consciousness Studies 12 (4-5):5-17.
    Synaesthesia is considered a rare perceptual capacity, and one that is not capable of cultivation. However, meditators report the experience quite commonly, and in questionnaire surveys, respondents claimed to experience synaesthesia in 35% of meditation retreatants, in 63% of a group of regular meditators, and in 86% of advanced teachers. These rates were significantly higher than in nonmeditator controls, and displayed significant correlations with measures of amount of meditation experience. A review of ancient texts found reports suggestive of synaesthesia in (...)
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  • Psilocybin, LSD, Mescaline and drug-induced synesthesia.Dimitria Electra Gatzia & Berit Brogaard - 2016 - In Victor R. Preedy (ed.), The Neuropathology Of Drug Addictions And Substance Misuse. Elsevier.
    Studies have shown that both serotonin and glutamate receptor systems play a crucial role in the mechanisms underlying drug-induced synesthesia. The specific nature of these mechanisms, however, continues to remain elusive. Here we propose two distinct hypotheses for how synesthesia triggered by hallucinogens in the serotonin-agonist family may occur. One hypothesis is that the drug-induced destabilization of thalamic projections via GABAergic neuronal circuits from sensory areas leads to a disruption of low-level, spontaneous integration of multisensory stimuli. This sort of integration (...)
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