Saccadic suppression of displacement: Separate influences of saccade size and of target retinal eccentricity
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چکیده
منابع مشابه
Saccadic suppression of displacement: Separate influences of saccade size and of target retinal eccentricity
The threshold for detection of displacements of visual objects is higher during voluntary saccades than it is during steady gaze ("saccadic suppression of displacement"; SSD). Relative contributions to SSD of extraretinal and retinal factors were investigated by measuring displacement thresholds in four experiments in which three observers judged whether a test flash, presented after a saccade ...
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Postsaccadic target blanking prevents saccadic suppression of image displacement
Displacement of a visual target during a saccadic eye movement is normally detected only at a high threshold, implying that high-quality information about target position is not stored in the nervous system across the saccade. We show that blanking the target for 50-300 msec after a saccade restores sensitivity to the displacement. With blanking, subjects reliably detect displacements as small ...
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HeImholtz (1867) suggested that the retinal image displacement vector, the afferent signal, is compared with the expected saccadic displacement vector, the efferent copy (Holst and Mittelstaedt, 1950) carried by the corollary discharge (Sperry, 1950) and this process may be called the " vectorial Helmholtzian com-parator for the frame of reference ". The results presented in this report show th...
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ژورنال
عنوان ژورنال: Vision Research
سال: 1997
ISSN: 0042-6989
DOI: 10.1016/s0042-6989(96)00301-x