P J Thomas

Geometric visual hallucinations, Euclidean symmetry and the functional architecture of striate cortex.

Philosophical transactions of the Royal Society of London. Series B, Biological sciences March 1, 2001 Paul C. Bressloff, Jack D. Cowan, Martin Golubitsky et al.

This paper is concerned with a striking visual experience: that of seeing geometric visual hallucinations. Hallucinatory images were classified by Klüver into four groups called form constants comprising (i) gratings, lattices, fretworks, filigrees, honeycombs and chequer-boards, (ii) cobwebs, (iii) tunnels, funnels, alleys, cones and vessels, and (iv) spirals. This paper describes a...