Hier der superfaszinierende TED-Talk vom Neurologen Oliver Sacks, in dem er über Halluzinationen von Leuten mit Sehbehinderungen spricht. Klingt erstmal trocken, ist aber tatsächlich ziemlich interessant. Ich habe ja Sacks Bücher „Der Mann, der seine Frau mit einem Hut verwechselte“ und „Musicophilia: Tales of Music and the Brain“ (Amazon Partnerlinks) gradezu verschlungen, der Mann hat ganz einfach einen der faszinierendsten Berufe überhaupt.
TED hat noch ein Interview mit ihm, Snip:
You wrote this book A Leg to Stand On and it was about your experience of having the leg, but having the feeling of leglessness, the opposite of phantom limb. And now you’re writing many years later about hallucinations and I’ve been told that you’re having some hallucinations yourself, in fact.
Well, I don’t have much vision in the right eye. I had a tumor in the right eye, which has been irradiated and lasered, and I hope laid to rest. But that has taken most of the retina with it on the right and so I’ve only got a little sliver of peripheral vision and the rest is a great black area of scotoma, which changes its appearance as soon as I look up at the ceiling -- then it camouflages and turns white, or turns blue if I look at the sky. And it tends to be full of tiny things, of tiny letters and numbers, which look rather like incised hieroglyphics to me, along with a few other simple things like chessboards and snails and spiders’ webs. So I’m just having fairly simple geometrical hallucinations. I’m not having faces or anything like this and don’t expect to have them.
But they’re very easy to separate from reality?
Um, yes. Mostly. Although occasionally, I confess, certainly in the early days, when I would perhaps go in to someone’s apartment and I would think, “What an interesting … what a curious stippled wallpaper.” And I’d mention this. And someone would say, “What do you mean stippled? It’s not stippled.” So, now I realize the stippling comes from me.