Dowiasch S, Henniges M, Kaminiarz A, Bremmer F, 2011, "Monocular visual localization during smooth pursuit eye movements" Perception 40 ECVP Abstract Supplement, page 111
Monocular visual localization during smooth pursuit eye movements
S Dowiasch, M Henniges, A Kaminiarz, F Bremmer
Localization of targets in the environment is of ultimate importance in everyday life. Eye movements challenge this task because they continuously induce a shift of the retinal image of the outside world. In recent years, many studies have demonstrated spatial mislocalization of stimuli flashed during eye movements. As of yet, the neural basis of this mislocalization is unknown. More specifically, it is unknown at what processing stage position signals and eye-movement signals are combined. We aimed to answer this question by investigating localization performance during smooth pursuit with monocular vision. Human observers had to localize briefly flashed targets during steady state monocular pursuit. Like for binocular pursuit, target positions were mislocalized in the direction of the eye movement. As a consequence, subjects localized targets at positions they had been blind for during fixation resulting in a perceptual shift of the blind spot. We conclude that mislocalization results from a rather late combination of two independent neural signals, ie information about the retinal location of a stimulus and information about an ongoing eye movement. This hypothesis predicts at a neuronal level visual receptive fields at identical retinal locations during fixation and smooth pursuit. Neurophysiological experiments are needed to validate this hypothesis.
[Supported by DFG FOR-560]
These web-based abstracts are provided for ease of seaching and access, but certain aspects (such as as mathematics) may not appear in their optimum form. For the final published version of this abstract, please see
ECVP 2011 Abstract Supplement (complete) size: 2206 Kb
[Publisher's note: The abstracts in this year's ECVP supplement have been published with virtually no copy editing by Pion, thus the standards of grammar and style may not match those of regular Perception articles.]