| Form Constant |
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| CATEGORIES ABOUT FORM CONSTANT | |
| symptoms | |
| psychedelics, dissociatives and deliriants | |
| geometric shapes | |
| divination | |
| symbols | |
| psychedelic research | |
| vision | |
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In s (including Honeycomb s, Checkerboard s, and triangles), Cobweb s, tunnels, and Spiral s. Klüver's form constants have appeared in other drug-induced and naturally-occurring hallucinations, suggesting a similar physiological process underlying hallucinations with different triggers. Klüver's form constants also appear in Near-death Experience s and hallucinations of those with Synesthesia . Other triggers include Psychological Stress , or Threshold Consciousness , including falling asleep, waking up, Insulin Hypoglycemia , the delirium of Fever , Epilepsy , Psychotic Episodes , advanced Syphilis , Sensory Deprivation , Photostimulation , Electrical Stimulation , Crystal Gazing , Migraine Headache s, Dizziness and a variety of Drug Intoxication s. The diversity of conditions that provoke such patterns suggests that form constants reflect some fundamental property of the Visual System . SEE ALSO REFERENCES # Blackmore, Susan . Dying to Live: Near-Death Experiences. Buffalo, NY: Prometheus Books, 1993. #Bressloff, Paul C., Jack D. Cowan, Martin Golubitsky, Peter J. Thomas, and Matthew C. Wiener. "What Geometric Visual Hallucinations Tell Us About the Visual Cortex." ''Neural Computation.'' Vol. 14, No. 3 (March 2002): 473-491. # Cytowic, Richard E. , The Man Who Tasted Shapes . #Ermentrout,G.B. and Cowan, J.D., "A mathematical theory of visual hallucination patterns." ''Biol. Cybernet.'' 34 (1979), no. 3, 137-150. |
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