Eero Simoncelli is in the Howard Hughes Medical Institute, Center for Neural Science, and Courant Institute of Mathematical Sciences, New York University, New York, New York 10003-1056, USA. David Heeger is in the Department of Psychology, Stanford University, Stanford, California 94305-2130, USA. eero.simoncelli@nyu.edu or heeger@white.stanford.edu
Speed preferences in MT neurons are found to be unaffected by changes in stimulus pattern, supporting the hypothesis that these neurons represent retinal image velocities.
