Motor space structures perceptual space: Evidence from human saccadic adaptation

Collins, Thérèse; Doré-Mazars, Karine; Lappe, Markus

doi:10.1016/j.brainres.2007.07.040

Cited by 74 publications

(142 citation statements)

References 18 publications

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“…Also, the modulation of visual mislocalization magnitude by orbital eye position was very similar to the modulation of saccade adaptation by orbital eye position. This result reinforces earlier evidence for a common mechanism of saccade and visual targeting (Collins et al, 2007;Lappe, 2009, 2010). If visual localization relies on motor metrics, any changes in motor metrics should be paralleled by homogeneous localization changes in visual perception.…”

Section: Discussionsupporting

confidence: 81%

“…Saccade targeting can be adaptively adjusted by artificially displacing the saccade target while the eye moves (McLaughlin, 1967;Hopp and Fuchs, 2004;Pélisson et al, 2010). Oculomotor plasticity is paralleled by changes in visual localization that shift the apparent position of visual objects in space (Bahcall and Kowler, 1999;Awater et al, 2005;Bruno and Morrone, 2007;Collins et al, 2007). Saccadic adaptationinduced distortions of visual space have been found even during fixation, suggesting a common mechanism for saccade and visual targeting (Moidell and Bedell, 1988;Schnier et al, 2010;Zimmermann and Lappe, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Discussionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Eye Position Effects in Oculomotor Plasticity and Visual Localization

Zimmermann

Lappe²

2011

J. Neurosci.

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“…Mislocalization of flashed probes after scanning saccades has not been tested previously, but adaptation of saccades in an overlap paradigm, which is usually considered to induce voluntary saccades, also induced mislocalization of flashed targets (Collins et al, 2007). The adaptation-induced mislocalization of stationary targets is a novel finding.…”

Section: Localization Resultsmentioning

confidence: 86%

“…Recent research has shown a reciprocal effect between visual localization and saccade targeting: modification of motor parameters by saccade adaptation leads to a distortion of visual localization (Bahcall and Kowler, 1999;Awater et al, 2005;Bruno and Morrone, 2007;Collins et al, 2007). This suggests that visual localization and saccade targeting share a common coordinate system, and common pathways in the brain, such that the signal that codes the required motor parameters to reach an object with a saccade also codes the perceived spatial position of that object.…”

Section: Introductionmentioning

confidence: 99%

Mislocalization of Flashed and Stationary Visual Stimuli after Adaptation of Reactive and Scanning Saccades

Zimmermann¹,

Lappe²

2009

J. Neurosci.

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When we look around and register the location of visual objects, our oculomotor system continuously prepares targets for saccadic eye movements. The preparation of saccade targets may be directly involved in the perception of object location because modification of saccade amplitude by saccade adaptation leads to a distortion of the visual localization of briefly flashed spatial probes. Here, we investigated effects of adaptation on the localization of continuously visible objects. We compared adaptation-induced mislocalization of probes that were present for 20 ms during the saccade preparation period and of probes that were present for Ͼ1 s before saccade initiation. We studied the mislocalization of these probes for two different saccade types, reactive saccades to a suddenly appearing target and scanning saccades in the self-paced viewing of a stationary scene. Adaptation of reactive saccades induced mislocalization of flashed probes. Adaptation of scanning saccades induced in addition also mislocalization of stationary objects. The mislocalization occurred in the absence of visual landmarks and must therefore originate from the change in saccade motor parameters. After adaptation of one type of saccade, the saccade amplitude change and the mislocalization transferred only weakly to the other saccade type. Mislocalization of flashed and stationary probes thus followed the selectivity of saccade adaptation. Since the generation and adaptation of reactive and scanning saccades are known to involve partially different brain mechanisms, our results suggest that visual localization of objects in space is linked to saccade targeting at multiple sites in the brain.

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“…This behavior is called saccadic adaptation and has been extensively studied in humans. The effects of saccadic adaptation not only influence the motion of the eye, but also the perception of space (Collins et al, 2007;Lappe, 2008).…”

Section: Introductionmentioning

confidence: 99%

Learning the visual–oculomotor transformation: Effects on saccade control and space representation

Antonelli

Durán

Chinellato

et al. 2015

Robotics and Autonomous Systems

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Active eye movements can be exploited to build a visuomotor representation of the surrounding environment. Maintaining and improving such representation requires to update the internal model involved in the generation of eye movements. From this perspective, action and perception are thus tightly coupled and interdependent. In this work, we encoded the internal model for oculomotor control with an adaptive filter inspired by the functionality of the cerebellum. Recurrent loops between a feed-back controller and the internal model allow our system to perform accurate binocular saccades and create an implicit representation of the nearby space. Simulations results show that this recurrent architecture outperforms classical feedback-error-learning in terms of both accuracy and sensitivity to system parameters. The proposed approach was validated implementing the framework on an anthropomorphic robotic head.

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Motor space structures perceptual space: Evidence from human saccadic adaptation

Cited by 74 publications

References 18 publications

Eye Position Effects in Oculomotor Plasticity and Visual Localization

Eye Position Effects in Oculomotor Plasticity and Visual Localization

Mislocalization of Flashed and Stationary Visual Stimuli after Adaptation of Reactive and Scanning Saccades

Learning the visual–oculomotor transformation: Effects on saccade control and space representation

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