The Hand Sees Visual Periphery Better Than the Eye: Motor-Dependent Visual Motion Analyses

Gomi, Hiroaki; Abekawa, Naotoshi; Shimojo, Shinsuke

doi:10.1523/jneurosci.4741-12.2013

Cited by 14 publications

(19 citation statements)

References 73 publications

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“…Returning to the studies in which the eyes were not pursuing a moving target, we see an apparent discrepancy between the results of our Experiment 3 and those of Gomi, Abekawa and Shimojo [22]. While we found that only motion nearby the targets was important, they showed that adding motion in the periphery made a difference.…”

Section: Discussioncontrasting

confidence: 99%

“…The moving background’s influence was also similar to the influence that was found when moving towards the position at which a target had been flashed [26], and when moving towards the position at which a static target had been just before the movement started [22,23,33,34]. Before discussing the small differences between how the moving background influenced the arm in our interception task and in movements towards static, flashed or removed targets, we will first discuss two larger apparent discrepancies between our results and those of previous studies in which the background moved while the eyes were pursuing a moving target that was to be hit.…”

Section: Discussionmentioning

confidence: 76%

“…Moreover, it also occurs when the region near the endpoint of the arm movement is occluded by a static grey disk, so that the background motion is quite far from the point that is fixated, and towards which the hand is moving [22]. The deviation of the arm in the direction of background motion increases with target speed [33], up to a limit that depends on the spatial frequency [34].…”

Section: Introductionmentioning

confidence: 99%

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How Moving Backgrounds Influence Interception

Brenner

Smeets

2015

PLoS ONE

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Reaching movements towards an object are continuously guided by visual information about the target and the arm. Such guidance increases precision and allows one to adjust the movement if the target unexpectedly moves. On-going arm movements are also influenced by motion in the surrounding. Fast responses to motion in the surrounding could help cope with moving obstacles and with the consequences of changes in one’s eye orientation and vantage point. To further evaluate how motion in the surrounding influences interceptive movements we asked subjects to tap a moving target when it reached a second, static target. We varied the direction and location of motion in the surrounding, as well as details of the stimuli that are known to influence eye movements. Subjects were most sensitive to motion in the background when such motion was near the targets. Whether or not the eyes were moving, and the direction of the background motion in relation to the direction in which the eyes were moving, had very little influence on the response to the background motion. We conclude that the responses to background motion are driven by motion near the target rather than by a global analysis of the optic flow and its relation with other information about self-motion.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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How Moving Backgrounds Influence Interception

Brenner

Smeets

2015

PLoS ONE

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“…Although these results would point to a strong dissociation in visual processing between perception and action, it is unclear whether all actions share a common representation of visual space. A recent study by Gomi, Abekawa, and Shimojo (2013) compared manual and ocular following responses to visual motion and found evidence for a dissociation, suggesting that visual motion processing may be carried out independently for different motor functions. However, this result is based only on reflexive, involuntary movements that are known to have different functional goals: The ocular following response serves to stabilize the image on the retina (Gellman, Carl, & Miles, 1990) whereas reflexive hand movements are used to adjust hand reaching with respect to concurrent body movements (Gomi, 2008).…”

Section: Introductionmentioning

confidence: 99%

Different spatial representations guide eye and hand movements

Lisi

Cavanagh

2017

Journal of Vision

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Our visual system allows us to localize objects in the world and plan motor actions toward them. We have recently shown that the localization of moving objects differs between perception and saccadic eye movements (Lisi & Cavanagh, 2015), suggesting different localization mechanisms for perception and action. This finding, however, could reflect a unique feature of the saccade system rather than a general dissociation between perception and action. To disentangle these hypotheses, we compared object localization between saccades and hand movements. We flashed brief targets on top of double-drift stimuli (moving Gabors with the internal pattern drifting orthogonally to their displacement, inducing large distortions in perceived location and direction) and asked participants to point or make saccades to them. We found a surprising difference between the two types of movements: Although saccades targeted the physical location of the flashes, pointing movements were strongly biased toward the perceived location (about 63% of the perceptual illusion). The same bias was found when pointing movements were made in open-loop conditions (without vision of the hand). These results indicate that dissociations are present between different types of actions (not only between action and perception) and that visual processing for saccadic eye movements differs from that for other actions. Because the position bias in the double-drift stimulus depends on a persisting influence of past sensory signals, we suggest that spatial maps for saccades might reflect only recent, short-lived signals, and the spatial representations supporting conscious perception and hand movements integrate visual input over longer temporal intervals.

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“…Moreover, RDK stimuli can elicit short-latency pursuit eye movements (Schütz et al 2010) and evoke directionally tuned responses in saccade-related lateral intraparietal neurons (Fanini and Assad 2009), showing that the motion signals in RDK stimuli have direct access to the oculomotor system. While visual target signals may have less direct access to arm motor circuits (Kubanek et al 2013), visual motion stimuli can also alter arm movements at short latencies (Saijo et al 2005;Gomi et al 2006Gomi et al , 2013. Therefore, using color as the critical attribute of the decision cues (DCs) has experimental advantages.…”

mentioning

confidence: 99%