Properties of smooth pursuit and visual motion reaction time to second-order motion stimuli
نویسندگان
چکیده
منابع مشابه
Speed Discrimination of Distal Stimuli during Smooth Pursuit Eye Motion
We evaluated the hypothesis that smooth pursuit eye movements affect speed discrimination thresholds of distal stimuli because they alter the retinal image speed. Subjects judged speed differences of sine-wave gratings while they simultaneously pursued a superimposed moving bar. Speed discrimination thresholds were measured, under conditions of controlled eye movements, for grating speeds of 0....
متن کاملPursuit eye movements to second-order motion targets.
We studied smooth-pursuit eye movements elicited by first- and second-order motion stimuli. Stimuli were random dot fields whose contrast was modulated by a Gaussian window with a space constant of 0.5 degrees. For the first-order stimuli, the random dots simply moved across the screen at the same speed as the window; for the second-order stimuli the window moved across stationary or randomly f...
متن کاملEstimating the time-to-passage of visual self-motion: Is the second order motion information processed?
Previous work demonstrated that estimating time-to-contact (TTC) of moving objects towards an observer is based only on first-order information and does not take into account the acceleration information. We investigated whether smooth and continuous speed variations are considered in the extrapolation of linear self-motion towards a stationary target. The time-to-passage (TTP) estimation task ...
متن کاملSmooth pursuit of nonvisual motion.
Unlike saccades, smooth pursuit eye movements (SPEMs) are not under voluntary control and their initiation generally requires a moving visual target. However, there are various reports of limited smooth pursuit of the motion of a subject's own finger in total darkness (pursuit based on proprioceptive feedback) and to the combination of proprioception and tactile motion as an unseen finger was m...
متن کاملInefficient visual search for second-order motion.
Visual search rate was used to assess attentional resources required for detection of opposing motions defined either by luminance or by modulations of texture contrast, flicker, or size. Though luminance-based targets were detected quickly, search through second-order motion was slow. Control experiments ruled out stimuli visibility, complexity, eccentricity sensitivity, and attributes of the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLOS ONE
سال: 2020
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0243430