期刊
JOURNAL OF NEUROPHYSIOLOGY
卷 120, 期 6, 页码 3198-3216出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/jn.00350.2018
关键词
foveal magnification; perceptual stability; perisaccadic spatial remapping; saccadic compression; superior colliculus
资金
- Werner Reichardt Centre for Integrative Neuroscience (CIN) at the Eberhard Karls University of Tubingen
- Deutsche Forschungsgemeinschaft [EXC 307]
- Hertie Institute for Clinical Brain Research at the Eberhard Karls University of Tubingen
Saccadic eye movements, which dramatically alter retinal images, are associated with robust perimovement perceptual alterations. Such alterations, thought to reflect brain mechanisms for maintaining perceptual stability in the face of saccade-induced retinal image disruptions, are often studied by asking subjects to localize brief stimuli presented around the time of horizontal saccades. However, other saccade directions are not usually explored. Motivated by recently discovered asymmetries in upper and lower visual field representations in the superior colliculus, a structure important for both saccade generation and visual analysis, we observed significant differences in perisaccadic perceptual alterations for upward saccades relative to other saccade directions. We also found that, even for purely horizontal saccades, perceptual alterations differ for upper vs. lower retinotopic stimulus locations. Our results, coupled with conceptual modeling, suggest that perisaccadic perceptual alterations might critically depend on neural circuits, such as superior colliculus, that asymmetrically represent the upper and lower visual fields. NEW & NOTEWORTHY Brief visual stimuli are robustly mislocalized around the time of saccades. Such mislocalization is thought to arise because oculomotor and visual neural maps distort space through foveal magnification. However, other neural asymmetries, such as upper visual field magnification in the superior colliculus, may also exist, raising the possibility that interactions between saccades and visual stimuli would depend on saccade direction. We confirmed this behaviorally by exploring and characterizing perisaccadic perception for upward saccades.
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