Rapid Formation of Spatiotopic Representations As Revealed by Inhibition of Return

Pertzov, Yoni; Zohary, Ehud; Avidan, Galia

doi:10.1523/jneurosci.3986-09.2010

Cited by 59 publications

(91 citation statements)

References 41 publications

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“…This experiment revealed 20 ms of environmental IOR at the cued location, t(11) = 2.44, p = 0.03, and no IOR at the cued retinal locus (1 ms), t(11) = 0.23, p = 0.82. These results are consistent with previous findings that retinotopic IOR is generally weaker than environmental IOR (He et al, 2015;Hilchey et al, 2012;Pertzov et al, 2010;Satel et al, 2012). The IOR at the far (remapped in the main experiment) location (−5 ms) was not significant, t(11) = 1.53, p = 0.15.…”

Section: Rtssupporting

confidence: 92%

“…1 These IOR effects were obtained with either manual button presses (Sapir, Hayes, Henik, Danziger, & Rafal, 2004; or saccadic responses Krüger & Hunt, 2013;Pertzov, Zohary, & Avidan, 2010) and were not artifacts created by the spatial gradient of IOR (He, Ding, & Wang, 2015).…”

Section: Introductionmentioning

confidence: 96%

“…The retinotopic IOR effect is likely the result of short-term depression of the early visual pathway caused by the cue (e.g., Satel, Wang, Trappenberg, & Klein, 2011). As for the environmental IOR, because it is observed immediately after saccades (He et al, 2015;Hilchey et al, 2012;Pertzov et al, 2010), predictive remapping might be the mechanism underlying it. Predictive remapping is a neural mechanism discovered by Duhamel, Colby, and Goldberg (1992).…”

Section: Introductionmentioning

confidence: 99%

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Predictive remapping gives rise to environmental inhibition of return

Yan

Klein

et al. 2016

Psychon Bull Rev

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Neurons in various brain regions predictively respond to stimuli that will be brought to their receptive fields by an impending eye movement. This neural mechanism, known as predictive remapping, has been suggested to underlie spatial constancy. Inhibition of return (IOR) is a bias against recently attended locations. The present study examined whether predictive remapping is a mechanism underlying IOR effects observed in environmental coordinates. The participant made saccades to a peripheral location after an IOR effect had been elicited by an onset cue and discriminated a target presented around the time of saccade onset. Immediately before the required saccade, IOR emerged at the retinal locus that would be brought to the cued location. A second task in which the participant maintained fixation during the entire trial ruled out the possibility that this IOR effect was simply the spillover of IOR from the cued location. These findings, for the first time, provide direct behavioral evidence that predictive remapping is a mechanism underlying environmental IOR.

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Section: Rtssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Predictive remapping gives rise to environmental inhibition of return

Yan

Klein

et al. 2016

Psychon Bull Rev

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“…Concurrent with this notion, behavioral studies that used perceptual tasks, such as visual discrimination (Golomb et al, 2008) or visual matching (McKyton et al, 2009), report retinotopic effects. In contrast, similar experiments requiring spatially specific motor response (i.e., saccade), do exhibit spatiotopic effects (Pertzov et al, 2010). Nevertheless, some perceptual tasks (typically involving judgment of motion) that did not require explicit action do exhibit evidence for the existence of a spatiotopic frame of reference (Melcher and Morrone, 2003;Burr et al, 2007).…”

Section: The Putative Role Of Spatiotopic Representation Of Saccadic mentioning

confidence: 94%

Multiple Reference Frames for Saccadic Planning in the Human Parietal Cortex

Pertzov¹,

Avidan²,

Zohary³

2011

J. Neurosci.

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We apply functional magnetic resonance imaging and multivariate analysis methods to study the coordinate frame in which saccades are represented in the human cortex. Subjects performed a memory-guided saccade task in which equal-amplitude eye movements were executed from several starting points to various directions. Response patterns during the memory period for same-vector saccades were correlated in the frontal eye fields and the intraparietal sulcus (IPS), indicating a retinotopic representation. Interestingly, response patterns in the middle aspect of the IPS were also correlated for saccades made to the same destination point, even when their movement vector was different. Thus, this region also contains information about saccade destination in (at least) a head-centered coordinate frame. This finding may explain behavioral and neuropsychological studies demonstrating that eye movements are also anchored to an egocentric or an allocentric representation of space rather than strictly to the retinal visual input and that parietal cortex is involved in maintaining these representations of space.

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“…Retinal encoding plus gaze modulation would also lead to functional spatiotopy. Spatiotopic encoding in human visual cortex is a matter of debate (Melcher and Morrone, 2003;d'Avossa et al, 2007;Gardner et al, 2008;Morris et al, 2010;Pertzov et al, 2010Pertzov et al, , 2011Burr and Morrone, 2011). It is an interesting question whether the nonretinotopic adaptation and the accompanied mislocalization are coded in spatiotopic coordinates.…”

mentioning

confidence: 99%

Eye Position Effects in Oculomotor Plasticity and Visual Localization

Zimmermann

Lappe²

2011

J. Neurosci.

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For visual localization to remain accurate across changes of gaze, a signal representing the position of the eye in the orbita is needed to code spatial locations in a reference frame that is independent of retinal displacements. Here we report evidence that the localization of visual objects in space is coded in an extraretinal reference frame. In human subjects, we used outward saccadic adaptation, which can be induced artificially by a systematic displacement of the saccade target. This form of oculomotor plasticity is accompanied by changes in spatial perception, thus highlighting the relevance of saccade metrics for visual localization. We tested the reference frame of outward adaptation for reactive and scanning saccades and visual localization. For scanning saccades, adaptation magnitude was drastically reduced at positions distant from the adapted eye position. Changes in visual localization showed a very similar modulation of eye position. These results suggest that scanning saccade adaptation is encoded in a nonretinotopic reference frame. Eye position effects for reactive saccade adaptation were smaller, and the induced mislocalization did not vary significantly between eye positions. The different modulation of reactive and scanning saccade adaptation supports the idea that oculomotor plasticity can occur at multiple sites in the brain. The findings are also consistent with previous evidence for a stronger influence of scanning saccade adaptation on the visual localization of objects in space.

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Rapid Formation of Spatiotopic Representations As Revealed by Inhibition of Return

Cited by 59 publications

References 41 publications

Predictive remapping gives rise to environmental inhibition of return

Predictive remapping gives rise to environmental inhibition of return

Multiple Reference Frames for Saccadic Planning in the Human Parietal Cortex

Eye Position Effects in Oculomotor Plasticity and Visual Localization

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