Dissociable saccadic suppression of pupillary and perceptual responses to light.
نویسندگان
چکیده
We measured pupillary constrictions in response to full-screen flashes of variable luminance, occurring either at the onset of a saccadic eye movement or well before/after it. A large fraction of perisaccadic flashes were undetectable to the subjects, consistent with saccadic suppression of visual sensitivity. Likewise, pupillary responses to perisaccadic flashes were strongly suppressed. However, the two phenomena appear to be dissociable. Across subjects and luminance levels of the flash stimulus, there were cases in which conscious perception of the flash was completely depleted yet the pupillary response was clearly present, as well as cases in which the opposite occurred. On one hand, the fact that pupillary light responses are subject to saccadic suppression reinforces evidence that this is not a simple reflex but depends on the integration of retinal illumination with complex "extraretinal" cues. On the other hand, the relative independence of pupillary and perceptual responses suggests that suppression acts separately on these systems-consistent with the idea of multiple visual pathways that are differentially affected by saccades.
منابع مشابه
Dissociable saccadic suppression of pupillary and perceptual responses to
19 We measured pupillary constrictions in response to full-screen flashes of variable luminance, 20 occurring either at the onset of a saccadic eye movement or well before/after it. A large fraction of 21 peri-saccadic flashes were undetectable to the subjects, consistent with saccadic suppression of 22 visual sensitivity. Likewise, pupillary responses to peri-saccadic flashes were strongly sup...
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ورودعنوان ژورنال:
- Journal of neurophysiology
دوره 115 3 شماره
صفحات -
تاریخ انتشار 2016