کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2043735 1073374 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Saccadic Facilitation in Natural Backgrounds
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Saccadic Facilitation in Natural Backgrounds
چکیده انگلیسی

SummaryIn visual systems with a fovea, only a small portion of the visual field can be analyzed with high accuracy. Saccadic eye movements shift that center of gaze around several times a second. Saccades have been characterized in great detail and depend critically on a number of visual properties of the stimuli 1, 2, 3, 4 and 5. However, typical experiments have used bright spots on dark backgrounds, while our natural environment has a highly characteristic rich spatial structure 6 and 7. Here we show that the saccadic system, unlike the perceptual system, is able to compensate for the masking caused by structured backgrounds. Consequently, saccadic latencies in the context of natural backgrounds are much faster than unstructured backgrounds at equal levels of visibility. The results suggest that whenever a structured background acts to mask the visibility of the saccade target, it simultaneously preactivates saccadic circuitry and thus ensures a fast reaction to potentially critical stimuli that are difficult to detect in our environment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 18, Issue 2, 22 January 2008, Pages 124–128
نویسندگان
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