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The "freezing rotation illusion" refers to decrease in perceived speed of a continuously rotating central region when a swaying surround co-rotates. We observed the following effects for rotations: First, when the centre and its surround are turning in the same direction, and their velocities are distinguishable, the perceived speed of the centre is lower(More)
Thirty patients with simple or ophthalmic migraine had an otoneurological examination. 13% complained of vertigo during attacks of migraine, 17% of giddiness and 6.7% of tinnitus. The usual tests for equilibrium were normal. On electronystagmographical examination 17% of the patients showed only pathological spontaneous nystagmus, 33% only disturbances of(More)
A series of illusions was created by presenting stimuli, which consisted of two overlapping surfaces each defined by textures of independent visual features (i.e., modulation of luminance, color, depth, etc.). When presented concurrently with a stationary 2-D luminance texture, observers often fail to perceive the motion of an overlapping stereoscopically(More)
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