# Heinrich Klüver [Wikipedia Link](https://en.wikipedia.org/wiki/Heinrich_Kl%C3%BCver) ( 1897 – 1979 ) ## Description German-American biological psychologist (University of Chicago) who conducted self-experiments with mescaline in the 1920s–30s and identified the recurring "form constants" of drug- and trance-induced hallucination — grid/lattice, spiral, tunnel/funnel, and cobweb patterns — a foundational concept for later research on entoptic imagery and altered states; also known for identifying Klüver–Bucy syndrome with Paul Bucy. ## Key Tags #entoptic #form-constants #optics #psychedelic #trance-film ## Essential Works - *Mescal and Mechanisms of Hallucinations* (1966; originally published 1928 as *Mescal: The "Divine" Plant and Its Psychological Effects*) - his key study identifying the four recurring geometric "form constants" of mescaline visions ## Details Klüver's form-constant taxonomy (grid, spiral, tunnel, cobweb/web) became the empirical basis for later theories linking entoptic phenomena to the neurology of vision and to trance and shamanic imagery across cultures — most directly taken up decades later by archaeologist [[David Lewis-Williams]] in his entoptic theory of rock art. His work sits at the root of this vault's ongoing interest in entoptic and altered-states imagery in experimental and psychedelic film. ### Concepts and Theories - [[Flicker and Entoptics]] - originated the "form constants" taxonomy that underlies later entoptic-phenomena theory - [[Transpersonal and psychedelic cinema]] - his mescaline research is a foundational scientific reference point for later psychedelic and trance film ### Creative and Technical Practices %% none yet %% ### Collaborators - [[David Lewis-Williams]] - Lewis-Williams' entoptic theory of rock art and shamanism directly builds on Klüver's form-constant research ### Institutional Affiliations and Associated Movements %% none yet %% ## References ### Primary Sources Bibliography Klüver, Heinrich. *Mescal and Mechanisms of Hallucinations*. University of Chicago Press, 1966. Consolidated edition of his form-constant research, originally published 1928. ### Secondary Sources Bibliography Bressloff, Paul C., et al. "Geometric Visual Hallucinations, Euclidean Symmetry, and the Functional Architecture of Striate Cortex." *Philosophical Transactions of the Royal Society B*, vol. 356, no. 1407, 2001, pp. 299–330. Neuromathematical model explaining Klüver's form constants via visual-cortex structure.