Show Reference: "Eye movements reset visual perception"

Eye movements reset visual perception Journal of Vision, Vol. 12, No. 13. (12 December 2012), doi:10.1167/12.13.11 by Michael A. Paradiso, Dar Meshi, Jordan Pisarcik, Samuel Levine
@article{paradiso-et-al-2012,
    abstract = {Human vision uses saccadic eye movements to rapidly shift the sensitive foveal portion of our retina to objects of interest. For vision to function properly amidst these ballistic eye movements, a mechanism is needed to extract discrete percepts on each fixation from the continuous stream of neural activity that spans fixations. The speed of visual parsing is crucial because human behaviors ranging from reading to driving to sports rely on rapid visual analysis. We find that a brain signal associated with moving the eyes appears to play a role in resetting visual analysis on each fixation, a process that may aid in parsing the neural signal. We quantified the degree to which the perception of tilt is influenced by the tilt of a stimulus on a preceding fixation. Two key conditions were compared, one in which a saccade moved the eyes from one stimulus to the next and a second simulated saccade condition in which the stimuli moved in the same manner but the subjects did not move their eyes. We find that there is a brief period of time at the start of each fixation during which the tilt of the previous stimulus influences perception (in a direction opposite to the tilt aftereffect)—perception is not instantaneously reset when a fixation starts. Importantly, the results show that this perceptual bias is much greater, with nearly identical visual input, when saccades are simulated. This finding suggests that, in real-saccade conditions, some signal related to the eye movement may be involved in the reset phenomenon. While proprioceptive information from the extraocular muscles is conceivably a factor, the fast speed of the effect we observe suggests that a more likely mechanism is a corollary discharge signal associated with eye movement.},
    author = {Paradiso, Michael A. and Meshi, Dar and Pisarcik, Jordan and Levine, Samuel},
    day = {12},
    doi = {10.1167/12.13.11},
    issn = {1534-7362},
    journal = {Journal of Vision},
    keywords = {biology, eye-movements, eye-saccades},
    month = dec,
    number = {13},
    pmid = {23241264},
    posted-at = {2012-12-19 13:12:20},
    priority = {2},
    publisher = {Association for Research in Vision and Ophthalmology},
    title = {Eye movements reset visual perception},
    url = {http://dx.doi.org/10.1167/12.13.11},
    volume = {12},
    year = {2012}
}

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Since we analyze complex visual scenes in chunks by saccading from one location to another, information about saccades must be used to break the constant stream of data coming from the eyes into chunks belonging to different locations in the visual field.

By contrasting performance in a condition in which their test subjects actually made saccades to that in a condition when only the image in front of their eyes was exchanged, Paradiso et al. showed that explicit information about saccades --- not just the change of visual input itself --- is responsible for resetting visual processing.

While the signal indicating a saccade could be proprioceptive, the timing in Paradiso et al.'s experiments hints at corollary discharge.