Friday, February 04, 2005 Hallucinatory Neurophysics Everyone knows what it's like to experience the hallucinations that accompany certain kinds of drug use (among other mind-altering contexts) -- if not from direct experience, at least from depictions in movies and literature. We've seen the colorful, swirling patterns, or the illusory tunnels stretching before us. It turns out that hallucinations are by no means random; there are certain recurrent patterns reported by people who experience them. These patterns were studied by Heinrich Kluever in the 1920's and 30's, and classified into four different structures: spirals, spokes, honeycombs, and cobwebs. Subsequent work has...
