The States — History.com Interactive Maps, Timelines & Games.
GCSE. Uncoiling the spiral: Maths and hallucinations. December 2009 You can read a more accessible version of this article here.
Think drug-induced hallucinations, and the whirly, spirally, tunnel-vision-like patterns of psychedelic imagery immediately spring to mind. But it's not just hallucinogenic drugs like LSD, cannabis or mescaline that conjure up these geometric structures. People have reported seeing them in near-death experiences, as a result of disorders like epilepsy and schizophrenia, following sensory deprivation, or even just after applying pressure to the eyeballs. So common are these geometric hallucinations, that in the last century scientists began asking themselves if they couldn't tell us something fundamental about how our brains are wired up.
SUBMISSIONS. Project Based Learning. 2008-11-07_1640 - KarenJan.